diff --git a/simple-mind-map/src/layouts/Fishbone copy 2.js b/simple-mind-map/src/layouts/Fishbone copy 2.js
new file mode 100644
index 00000000..36d1afdf
--- /dev/null
+++ b/simple-mind-map/src/layouts/Fishbone copy 2.js	
@@ -0,0 +1,368 @@
+import Base from './Base'
+import { walk, asyncRun } from '../utils'
+import { CONSTANTS } from '../utils/constant'
+
+const degToRad = deg => {
+  return (Math.PI / 180) * deg
+}
+
+//  鱼骨图
+class Fishbone extends Base {
+  //  构造函数
+  constructor(opt = {}) {
+    super(opt)
+  }
+
+  //  布局
+  doLayout(callback) {
+    let task = [
+      () => {
+        this.computedBaseValue()
+      },
+      () => {
+        this.computedLeftTopValue()
+      },
+      () => {
+        this.adjustLeftTopValue()
+      },
+      () => {
+        callback(this.root)
+      }
+    ]
+    asyncRun(task)
+  }
+
+  //  遍历数据创建节点、计算根节点的位置，计算根节点的子节点的top值
+  computedBaseValue() {
+    walk(
+      this.renderer.renderTree,
+      null,
+      (node, parent, isRoot, layerIndex, index) => {
+        // 创建节点
+        let newNode = this.createNode(node, parent, isRoot, layerIndex)
+        // 根节点定位在画布中心位置
+        if (isRoot) {
+          this.setNodeCenter(newNode)
+        } else {
+          // 非根节点
+          // 三级及以下节点以上级方向为准
+          if (parent._node.dir) {
+            newNode.dir = parent._node.dir
+          } else {
+            // 节点生长方向
+            newNode.dir =
+              index % 2 === 0
+                ? CONSTANTS.TIMELINE_DIR.TOP
+                : CONSTANTS.TIMELINE_DIR.BOTTOM
+          }
+          // 计算二级节点的top值
+          if (parent._node.isRoot) {
+            newNode.top = parent._node.top - newNode.height
+          }
+        }
+        if (!node.data.expand) {
+          return true
+        }
+      },
+      null,
+      true,
+      0
+    )
+  }
+
+  //  遍历节点树计算节点的left、top
+  computedLeftTopValue() {
+    walk(
+      this.root,
+      null,
+      (node, parent, isRoot, layerIndex, index) => {
+        if (node.isRoot) {
+          let totalLeft = node.left + node.width
+          node.children.forEach(item => {
+            item.left = totalLeft
+            totalLeft += item.width
+          })
+        }
+        if (layerIndex >= 1 && node.children) {
+          // 遍历三级及以下节点的子节点
+          let startLeft = node.left + node.width * 0.5
+          let totalTop =
+            node.top +
+            node.height +
+            (this.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
+          node.children.forEach(item => {
+            item.left = startLeft
+            item.top += totalTop
+            totalTop +=
+              item.height +
+              (this.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+          })
+        }
+      },
+      null,
+      true
+    )
+  }
+
+  //  调整节点left、top
+  adjustLeftTopValue() {
+    walk(
+      this.root,
+      null,
+      (node, parent, isRoot, layerIndex) => {
+        if (!node.nodeData.data.expand) {
+          return
+        }
+        // 调整top
+        let len = node.children.length
+        // 调整三级及以下节点的top
+        if (parent && !parent.isRoot && len > 0) {
+          let totalHeight = node.children.reduce((h, item) => {
+            return (
+              h +
+              item.height +
+              (this.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+            )
+          }, 0)
+          this.updateBrothersTop(node, totalHeight)
+        }
+      },
+      (node, parent) => {
+        // 将二级节点的子节点移到上方
+        if (parent && parent.isRoot) {
+          // 遍历二级节点的子节点
+          let totalHeight = 0
+          node.children.forEach(item => {
+            // 调整top
+            let nodeTotalHeight = this.getNodeAreaHeight(item)
+            let _top = item.top
+            item.top =
+              node.top - (item.top - node.top) - nodeTotalHeight + node.height
+            // 调整left
+            let offsetLeft =
+              (nodeTotalHeight + totalHeight) / Math.tan(degToRad(45))
+            item.left += offsetLeft
+            totalHeight += nodeTotalHeight
+            // 同步更新后代节点
+            this.updateChildrenPro(item.children, {
+              top: item.top - _top,
+              left: offsetLeft
+            })
+          })
+        }
+        // 调整二级节点的子节点的left值
+        if (node.isRoot) {
+          let totalLeft = 0
+          node.children.forEach(item => {
+            item.left += totalLeft
+            this.updateChildren(item.children, 'left', totalLeft)
+            let { left, right } = this.getNodeBoundaries(item, 'h')
+            totalLeft += right - left
+          })
+        }
+      },
+      true
+    )
+  }
+
+  //  递归计算节点的宽度
+  getNodeAreaWidth(node) {
+    let widthArr = []
+    let loop = (node, width) => {
+      if (node.children.length) {
+        width += node.width / 2
+        node.children.forEach(item => {
+          loop(item, width)
+        })
+      } else {
+        width += node.width
+        widthArr.push(width)
+      }
+    }
+    loop(node, 0)
+    return Math.max(...widthArr)
+  }
+
+  //  递归计算节点的宽度
+  getNodeAreaHeight(node) {
+    let totalHeight = 0
+    let loop = node => {
+      totalHeight +=
+        node.height +
+        (this.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
+      if (node.children.length) {
+        node.children.forEach(item => {
+          loop(item)
+        })
+      }
+    }
+    loop(node)
+    return totalHeight
+  }
+
+  //  调整兄弟节点的left
+  updateBrothersLeft(node) {
+    let childrenList = node.children
+    let totalAddWidth = 0
+    childrenList.forEach(item => {
+      item.left += totalAddWidth
+      if (item.children && item.children.length) {
+        this.updateChildren(item.children, 'left', totalAddWidth)
+      }
+      // let areaWidth = this.getNodeAreaWidth(item)
+      let { left, right } = this.getNodeBoundaries(item, 'h')
+      let areaWidth = right - left
+      let difference = areaWidth - item.width
+      if (difference > 0) {
+        totalAddWidth += difference
+      }
+    })
+  }
+
+  //  调整兄弟节点的top
+  updateBrothersTop(node, addHeight) {
+    if (node.parent && !node.parent.isRoot) {
+      let childrenList = node.parent.children
+      let index = childrenList.findIndex(item => {
+        return item === node
+      })
+      childrenList.forEach((item, _index) => {
+        if (item.hasCustomPosition()) {
+          // 适配自定义位置
+          return
+        }
+        let _offset = 0
+        // 下面的节点往下移
+        if (_index > index) {
+          _offset = addHeight
+        }
+        item.top += _offset
+        // 同步更新子节点的位置
+        if (item.children && item.children.length) {
+          this.updateChildren(item.children, 'top', _offset)
+        }
+      })
+      // 更新父节点的位置
+      this.updateBrothersTop(node.parent, addHeight)
+    }
+  }
+
+  //  绘制连线，连接该节点到其子节点
+  renderLine(node, lines, style) {
+    if (node.children.length <= 0) {
+      return []
+    }
+    let { left, top, width, height, expandBtnSize } = node
+    let len = node.children.length
+    if (node.isRoot) {
+      // 当前节点是根节点
+      let prevBother = node
+      // 根节点的子节点是和根节点同一水平线排列
+      node.children.forEach((item, index) => {
+        let x1 = prevBother.left + prevBother.width
+        let x2 = item.left
+        let y = node.top + node.height / 2
+        let path = `M ${x1},${y} L ${x2},${y}`
+        lines[index].plot(path)
+        style && style(lines[index], item)
+        prevBother = item
+      })
+    } else {
+      // 当前节点为非根节点
+      let maxy = -Infinity
+      let miny = Infinity
+      let maxx = -Infinity
+      let x = node.left + node.width * 0.3
+      node.children.forEach((item, index) => {
+        if (item.left > maxx) {
+          maxx = item.left
+        }
+        let y = item.top + item.height / 2
+        if (y > maxy) {
+          maxy = y
+        }
+        if (y < miny) {
+          miny = y
+        }
+        // 水平线
+        if (node.layerIndex > 1) {
+          let path = `M ${x},${y} L ${item.left},${y}`
+          lines[index].plot(path)
+          style && style(lines[index], item)
+        }
+      })
+      // 竖线
+      if (len > 0) {
+        let line = this.draw.path()
+        expandBtnSize = len > 0 ? expandBtnSize : 0
+        let lineLength = maxx - node.left - node.width * 0.3
+        if (
+          node.parent &&
+          node.parent.isRoot &&
+          node.dir === CONSTANTS.TIMELINE_DIR.TOP
+        ) {
+          line.plot(
+            `M ${x},${top} L ${x + lineLength},${
+              top - Math.tan(degToRad(45)) * lineLength
+            }`
+          )
+        } else {
+          if (node.parent && node.parent.isRoot) {
+            line.plot(
+              `M ${x},${top} L ${x + lineLength},${
+                top - Math.tan(degToRad(45)) * lineLength
+              }`
+            )
+          } else {
+            line.plot(`M ${x},${top + height + expandBtnSize} L ${x},${maxy}`)
+          }
+        }
+        node.style.line(line)
+        node._lines.push(line)
+        style && style(line, node)
+      }
+    }
+  }
+
+  //  渲染按钮
+  renderExpandBtn(node, btn) {
+    let { width, height, expandBtnSize, isRoot } = node
+    if (!isRoot) {
+      let { translateX, translateY } = btn.transform()
+      if (node.parent && node.parent.isRoot) {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          -expandBtnSize / 2 - translateY
+        )
+      } else {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          height + expandBtnSize / 2 - translateY
+        )
+      }
+    }
+  }
+
+  //  创建概要节点
+  renderGeneralization(node, gLine, gNode) {
+    let {
+      top,
+      bottom,
+      right,
+      generalizationLineMargin,
+      generalizationNodeMargin
+    } = this.getNodeBoundaries(node, 'h')
+    let x1 = right + generalizationLineMargin
+    let y1 = top
+    let x2 = right + generalizationLineMargin
+    let y2 = bottom
+    let cx = x1 + 20
+    let cy = y1 + (y2 - y1) / 2
+    let path = `M ${x1},${y1} Q ${cx},${cy} ${x2},${y2}`
+    gLine.plot(path)
+    gNode.left = right + generalizationNodeMargin
+    gNode.top = top + (bottom - top - gNode.height) / 2
+  }
+}
+
+export default Fishbone
diff --git a/simple-mind-map/src/layouts/Fishbone.js b/simple-mind-map/src/layouts/Fishbone.js
index 32413010..7f63e236 100644
--- a/simple-mind-map/src/layouts/Fishbone.js
+++ b/simple-mind-map/src/layouts/Fishbone.js
@@ -1,10 +1,7 @@
 import Base from './Base'
-import { walk, asyncRun } from '../utils'
+import { walk, asyncRun, degToRad } from '../utils'
 import { CONSTANTS } from '../utils/constant'
-
-const degToRad = deg => {
-  return (Math.PI / 180) * deg
-}
+import utils from './fishboneUtils'
 
 //  鱼骨图
 class Fishbone extends Base {
@@ -57,7 +54,11 @@ class Fishbone extends Base {
           }
           // 计算二级节点的top值
           if (parent._node.isRoot) {
-            newNode.top = parent._node.top - newNode.height
+            if (newNode.dir === 'top') {
+              newNode.top = parent._node.top - newNode.height
+            } else {
+              newNode.top = parent._node.top + parent._node.height
+            }
           }
         }
         if (!node.data.expand) {
@@ -77,26 +78,23 @@ class Fishbone extends Base {
       null,
       (node, parent, isRoot, layerIndex, index) => {
         if (node.isRoot) {
-          let totalLeft = node.left + node.width
+          let topTotalLeft = node.left + node.width + node.height
+          let bottomTotalLeft = node.left + node.width + node.height
           node.children.forEach(item => {
-            item.left = totalLeft
-            totalLeft += item.width
+            if (item.dir === 'top') {
+              item.left = topTotalLeft
+              topTotalLeft += item.width
+            } else {
+              item.left = bottomTotalLeft + 20
+              bottomTotalLeft += item.width
+            }
           })
         }
-        if (layerIndex >= 1 && node.children) {
-          // 遍历三级及以下节点的子节点
-          let startLeft = node.left + node.width * 0.5
-          let totalTop =
-            node.top +
-            node.height +
-            (this.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
-          node.children.forEach(item => {
-            item.left = startLeft
-            item.top += totalTop
-            totalTop +=
-              item.height +
-              (this.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
-          })
+        let params = { layerIndex, node, ctx: this }
+        if (node.dir === 'top') {
+          utils.top.computedLeftTopValue(params)
+        } else {
+          utils.bottom.computedLeftTopValue(params)
         }
       },
       null,
@@ -113,51 +111,36 @@ class Fishbone extends Base {
         if (!node.nodeData.data.expand) {
           return
         }
-        // 调整top
-        let len = node.children.length
-        // 调整三级及以下节点的top
-        if (parent && !parent.isRoot && len > 0) {
-          let totalHeight = node.children.reduce((h, item) => {
-            return (
-              h +
-              item.height +
-              (this.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
-            )
-          }, 0)
-          this.updateBrothersTop(node, totalHeight)
+        let params = { node, parent, layerIndex, ctx: this }
+        if (node.dir === 'top') {
+          utils.top.adjustLeftTopValueBefore(params)
+        } else {
+          utils.bottom.adjustLeftTopValueBefore(params)
         }
       },
       (node, parent) => {
-        // 将二级节点的子节点移到上方
-        if (parent && parent.isRoot) {
-          // 遍历二级节点的子节点
-          let totalHeight = 0
-          node.children.forEach(item => {
-            // 调整top
-            let nodeTotalHeight = this.getNodeAreaHeight(item)
-            let _top = item.top
-            item.top =
-              node.top - (item.top - node.top) - nodeTotalHeight + node.height
-            // 调整left
-            let offsetLeft =
-              (nodeTotalHeight + totalHeight) / Math.tan(degToRad(45))
-            item.left += offsetLeft
-            totalHeight += nodeTotalHeight
-            // 同步更新后代节点
-            this.updateChildrenPro(item.children, {
-              top: item.top - _top,
-              left: offsetLeft
-            })
-          })
+        let params = { parent, node, ctx: this }
+        if (node.dir === 'top') {
+          utils.top.adjustLeftTopValueAfter(params)
+        } else {
+          utils.bottom.adjustLeftTopValueAfter(params)
         }
         // 调整二级节点的子节点的left值
         if (node.isRoot) {
-          let totalLeft = 0
+          let topTotalLeft = 0
+          let bottomTotalLeft = 0
           node.children.forEach(item => {
-            item.left += totalLeft
-            this.updateChildren(item.children, 'left', totalLeft)
-            let { left, right } = this.getNodeBoundaries(item, 'h')
-            totalLeft += right - left
+            if (item.dir === 'top') {
+              item.left += topTotalLeft
+              this.updateChildren(item.children, 'left', topTotalLeft)
+              let { left, right } = this.getNodeBoundaries(item, 'h')
+              topTotalLeft += right - left
+            } else {
+              item.left += bottomTotalLeft
+              this.updateChildren(item.children, 'left', bottomTotalLeft)
+              let { left, right } = this.getNodeBoundaries(item, 'h')
+              bottomTotalLeft += right - left
+            }
           })
         }
       },
@@ -243,30 +226,66 @@ class Fishbone extends Base {
         }
       })
       // 更新父节点的位置
-      this.updateBrothersTop(node.parent, addHeight)
+      if (node.dir === 'top') {
+        this.updateBrothersTop(node.parent, addHeight)
+      } else {
+        this.updateBrothersTop(
+          node.parent,
+          node.layerIndex === 3 ? 0 : addHeight
+        )
+      }
     }
   }
 
   //  绘制连线，连接该节点到其子节点
   renderLine(node, lines, style) {
-    if (node.children.length <= 0) {
+    if (node.layerIndex !== 1 && node.children.length <= 0) {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
     let len = node.children.length
     if (node.isRoot) {
       // 当前节点是根节点
-      let prevBother = node
       // 根节点的子节点是和根节点同一水平线排列
-      node.children.forEach((item, index) => {
-        let x1 = prevBother.left + prevBother.width
-        let x2 = item.left
-        let y = node.top + node.height / 2
-        let path = `M ${x1},${y} L ${x2},${y}`
-        lines[index].plot(path)
-        style && style(lines[index], item)
-        prevBother = item
+      let maxx = -Infinity
+      node.children.forEach(item => {
+        if (item.left > maxx) {
+          maxx = item.left
+        }
+        // 水平线段到二级节点的连线
+        let nodeLineX = item.left + item.width * 0.3
+        let offset = item.height + node.height / 2
+        let offsetX = offset / Math.tan(degToRad(45))
+        let line = this.draw.path()
+        if (item.dir === 'top') {
+          line.plot(
+            `M ${nodeLineX - offsetX},${item.top + offset} L ${nodeLineX},${
+              item.top
+            }`
+          )
+        } else {
+          line.plot(
+            `M ${nodeLineX - offsetX},${
+              item.top + item.height - offset
+            } L ${nodeLineX},${item.top + item.height}`
+          )
+        }
+        node.style.line(line)
+        node._lines.push(line)
+        style && style(line, node)
       })
+      // 从根节点出发的水平线
+      let nodeHalfTop = node.top + node.height / 2
+      let offset = node.height / 2
+      let line = this.draw.path()
+      line.plot(
+        `M ${node.left + node.width},${nodeHalfTop} L ${
+          maxx - offset / Math.tan(degToRad(45))
+        },${nodeHalfTop}`
+      )
+      node.style.line(line)
+      node._lines.push(line)
+      style && style(line, node)
     } else {
       // 当前节点为非根节点
       let maxy = -Infinity
@@ -291,36 +310,27 @@ class Fishbone extends Base {
           style && style(lines[index], item)
         }
       })
-      // 竖线
-      if (len > 0) {
+      // 斜线
+      if (len >= 0) {
         let line = this.draw.path()
         expandBtnSize = len > 0 ? expandBtnSize : 0
         let lineLength = maxx - node.left - node.width * 0.3
-        if (
-          node.parent &&
-          node.parent.isRoot &&
-          node.dir === CONSTANTS.TIMELINE_DIR.TOP
-        ) {
-          line.plot(
-            `M ${x},${top} L ${x + lineLength},${
-              top - Math.tan(degToRad(45)) * lineLength
-            }`
-          )
+        lineLength = Math.max(lineLength, 0)
+        let params = {
+          node,
+          line,
+          top,
+          x,
+          lineLength,
+          height,
+          expandBtnSize,
+          maxy,
+          miny
+        }
+        if (node.dir === 'top') {
+          utils.top.renderLine(params)
         } else {
-          if (node.parent && node.parent.isRoot) {
-            line.plot(
-              `M ${x},${top} L ${x + lineLength},${
-                top - Math.tan(degToRad(45)) * lineLength
-              }`
-            )
-            // line.plot(
-            //   `M ${x},${top + height + expandBtnSize} L ${x + 1000},${
-            //     top + Math.tan(degToRad(45)) * 1000
-            //   }`
-            // )
-          } else {
-            line.plot(`M ${x},${top + height + expandBtnSize} L ${x},${maxy}`)
-          }
+          utils.bottom.renderLine(params)
         }
         node.style.line(line)
         node._lines.push(line)
@@ -334,16 +344,19 @@ class Fishbone extends Base {
     let { width, height, expandBtnSize, isRoot } = node
     if (!isRoot) {
       let { translateX, translateY } = btn.transform()
-      if (node.parent && node.parent.isRoot) {
-        btn.translate(
-          width * 0.3 - expandBtnSize / 2 - translateX,
-          -expandBtnSize / 2 - translateY
-        )
+      let params = {
+        node,
+        btn,
+        expandBtnSize,
+        translateX,
+        translateY,
+        width,
+        height
+      }
+      if (node.dir === 'top') {
+        utils.top.renderExpandBtn(params)
       } else {
-        btn.translate(
-          width * 0.3 - expandBtnSize / 2 - translateX,
-          height + expandBtnSize / 2 - translateY
-        )
+        utils.bottom.renderExpandBtn(params)
       }
     }
   }
diff --git a/simple-mind-map/src/layouts/fishboneUtils.js b/simple-mind-map/src/layouts/fishboneUtils.js
new file mode 100644
index 00000000..9b567121
--- /dev/null
+++ b/simple-mind-map/src/layouts/fishboneUtils.js
@@ -0,0 +1,217 @@
+import { degToRad } from '../utils/'
+
+export default {
+  top: {
+    renderExpandBtn({
+      node,
+      btn,
+      expandBtnSize,
+      translateX,
+      translateY,
+      width,
+      height
+    }) {
+      if (node.parent && node.parent.isRoot) {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          -expandBtnSize / 2 - translateY
+        )
+      } else {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          height + expandBtnSize / 2 - translateY
+        )
+      }
+    },
+    renderLine({
+      node,
+      line,
+      top,
+      x,
+      lineLength,
+      height,
+      expandBtnSize,
+      maxy
+    }) {
+      if (node.parent && node.parent.isRoot) {
+        line.plot(
+          `M ${x},${top} L ${x + lineLength},${
+            top - Math.tan(degToRad(45)) * lineLength
+          }`
+        )
+      } else {
+        line.plot(`M ${x},${top + height + expandBtnSize} L ${x},${maxy}`)
+      }
+    },
+    computedLeftTopValue({ layerIndex, node, ctx }) {
+      if (layerIndex >= 1 && node.children) {
+        // 遍历三级及以下节点的子节点
+        let startLeft = node.left + node.width * 0.5
+        let totalTop =
+          node.top +
+          node.height +
+          (ctx.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
+        node.children.forEach(item => {
+          item.left = startLeft
+          item.top += totalTop
+          totalTop +=
+            item.height +
+            (ctx.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+        })
+      }
+    },
+    adjustLeftTopValueBefore({ node, parent, ctx }) {
+      // 调整top
+      let len = node.children.length
+      // 调整三级及以下节点的top
+      if (parent && !parent.isRoot && len > 0) {
+        let totalHeight = node.children.reduce((h, item) => {
+          return (
+            h +
+            item.height +
+            (ctx.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+          )
+        }, 0)
+        ctx.updateBrothersTop(node, totalHeight)
+      }
+    },
+    adjustLeftTopValueAfter({ parent, node, ctx }) {
+      // 将二级节点的子节点移到上方
+      if (parent && parent.isRoot) {
+        // 遍历二级节点的子节点
+        let totalHeight = 0
+        node.children.forEach(item => {
+          // 调整top
+          let nodeTotalHeight = ctx.getNodeAreaHeight(item)
+          let _top = item.top
+          item.top =
+            node.top - (item.top - node.top) - nodeTotalHeight + node.height
+          // 调整left
+          let offsetLeft =
+            (nodeTotalHeight + totalHeight) / Math.tan(degToRad(45))
+          item.left += offsetLeft
+          totalHeight += nodeTotalHeight
+          // 同步更新后代节点
+          ctx.updateChildrenPro(item.children, {
+            top: item.top - _top,
+            left: offsetLeft
+          })
+        })
+      }
+    }
+  },
+  bottom: {
+    renderExpandBtn({
+      node,
+      btn,
+      expandBtnSize,
+      translateX,
+      translateY,
+      width,
+      height
+    }) {
+      if (node.parent && node.parent.isRoot) {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          height + expandBtnSize / 2 - translateY
+        )
+      } else {
+        btn.translate(
+          width * 0.3 - expandBtnSize / 2 - translateX,
+          -expandBtnSize / 2 - translateY
+        )
+      }
+    },
+    renderLine({ node, line, top, x, lineLength, height, miny }) {
+      if (node.parent && node.parent.isRoot) {
+        line.plot(
+          `M ${x},${top + height} L ${x + lineLength},${
+            top + height + Math.tan(degToRad(45)) * lineLength
+          }`
+        )
+      } else {
+        line.plot(`M ${x},${top} L ${x},${miny}`)
+      }
+    },
+    computedLeftTopValue({ layerIndex, node, ctx }) {
+      if (layerIndex === 1 && node.children) {
+        // 遍历二级节点的子节点
+        let startLeft = node.left + node.width * 0.5
+        let totalTop =
+          node.top +
+          node.height +
+          (ctx.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
+
+        node.children.forEach(item => {
+          item.left = startLeft
+          item.top =
+            totalTop +
+            (ctx.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+          totalTop +=
+            item.height +
+            (ctx.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+        })
+      }
+      if (layerIndex > 1 && node.children) {
+        // 遍历三级及以下节点的子节点
+        let startLeft = node.left + node.width * 0.5
+        let totalTop =
+          node.top -
+          (ctx.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
+        node.children.forEach(item => {
+          item.left = startLeft
+          item.top = totalTop - item.height
+          totalTop -=
+            item.height +
+            (ctx.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+        })
+      }
+    },
+    adjustLeftTopValueBefore({ node, ctx, layerIndex }) {
+      // 调整top
+      let len = node.children.length
+      if (layerIndex > 2 && len > 0) {
+        let totalHeight = node.children.reduce((h, item) => {
+          return (
+            h +
+            item.height +
+            (ctx.getNodeActChildrenLength(item) > 0 ? item.expandBtnSize : 0)
+          )
+        }, 0)
+        ctx.updateBrothersTop(node, -totalHeight)
+      }
+    },
+    adjustLeftTopValueAfter({ parent, node, ctx }) {
+      // 将二级节点的子节点移到上方
+      if (parent && parent.isRoot) {
+        // 遍历二级节点的子节点
+        let totalHeight = 0
+        let totalHeight2 = 0
+        node.children.forEach(item => {
+          // 调整top
+          let hasChildren = ctx.getNodeActChildrenLength(item) > 0
+          let nodeTotalHeight = ctx.getNodeAreaHeight(item)
+          let offset =
+            hasChildren > 0
+              ? nodeTotalHeight -
+                item.height -
+                (hasChildren ? item.expandBtnSize : 0)
+              : 0
+          let _top = totalHeight + offset
+          item.top += _top
+          // 调整left
+          let offsetLeft =
+            (totalHeight2 + nodeTotalHeight) / Math.tan(degToRad(45))
+          item.left += offsetLeft
+          totalHeight += offset
+          totalHeight2 += nodeTotalHeight
+          // 同步更新后代节点
+          ctx.updateChildrenPro(item.children, {
+            top: _top,
+            left: offsetLeft
+          })
+        })
+      }
+    }
+  }
+}