diff --git a/simple-mind-map/src/constants/defaultOptions.js b/simple-mind-map/src/constants/defaultOptions.js
index 111d8ac6..9bcf33de 100644
--- a/simple-mind-map/src/constants/defaultOptions.js
+++ b/simple-mind-map/src/constants/defaultOptions.js
@@ -68,13 +68,21 @@ export const defaultOpt = {
   // 展开收起按钮的颜色
   expandBtnStyle: {
     color: '#808080',
-    fill: '#fff'
+    fill: '#fff',
+    fontSize: 13,
+    strokeColor: '#333333'
   },
   // 自定义展开收起按钮的图标
   expandBtnIcon: {
     open: '', // svg字符串
     close: ''
   },
+  // 处理收起节点数量
+  expandBtnNumHandler: num => {
+    return num
+  },
+  // 是否显示带数量的收起按钮
+  isShowExpandNum: true,
   // 是否只有当鼠标在画布内才响应快捷键事件
   enableShortcutOnlyWhenMouseInSvg: true,
   // 初始根节点的位置
diff --git a/simple-mind-map/src/core/render/node/Style.js b/simple-mind-map/src/core/render/node/Style.js
index 2f8ab7f0..98341bee 100644
--- a/simple-mind-map/src/core/render/node/Style.js
+++ b/simple-mind-map/src/core/render/node/Style.js
@@ -1,6 +1,15 @@
-import { tagColorList, nodeDataNoStylePropList } from '../../../constants/constant'
+import {
+  tagColorList,
+  nodeDataNoStylePropList
+} from '../../../constants/constant'
 const rootProp = ['paddingX', 'paddingY']
-const backgroundStyleProps = ['backgroundColor', 'backgroundImage', 'backgroundRepeat', 'backgroundPosition', 'backgroundSize']
+const backgroundStyleProps = [
+  'backgroundColor',
+  'backgroundImage',
+  'backgroundRepeat',
+  'backgroundPosition',
+  'backgroundSize'
+]
 
 //  样式类
 class Style {
@@ -10,12 +19,18 @@ class Style {
     if (!Style.cacheStyle) {
       Style.cacheStyle = {}
       let style = window.getComputedStyle(el)
-      backgroundStyleProps.forEach((prop) => {
+      backgroundStyleProps.forEach(prop => {
         Style.cacheStyle[prop] = style[prop]
       })
     }
     // 设置新样式
-    let { backgroundColor, backgroundImage, backgroundRepeat, backgroundPosition, backgroundSize } = themeConfig
+    let {
+      backgroundColor,
+      backgroundImage,
+      backgroundRepeat,
+      backgroundPosition,
+      backgroundSize
+    } = themeConfig
     el.style.backgroundColor = backgroundColor
     if (backgroundImage && backgroundImage !== 'none') {
       el.style.backgroundImage = `url(${backgroundImage})`
@@ -30,7 +45,7 @@ class Style {
   // 移除背景样式
   static removeBackgroundStyle(el) {
     if (!Style.cacheStyle) return
-    backgroundStyleProps.forEach((prop) => {
+    backgroundStyleProps.forEach(prop => {
       el.style[prop] = Style.cacheStyle[prop]
     })
     Style.cacheStyle = null
@@ -131,10 +146,10 @@ class Style {
 
   // 获取文本样式
   getTextFontStyle() {
-    return { 
-      italic: this.merge('fontStyle') === 'italic', 
-      bold: this.merge('fontWeight'), 
-      fontSize: this.merge('fontSize'), 
+    return {
+      italic: this.merge('fontStyle') === 'italic',
+      bold: this.merge('fontWeight'),
+      fontSize: this.merge('fontSize'),
       fontFamily: this.merge('fontFamily')
     }
   }
@@ -190,19 +205,26 @@ class Style {
 
   //  展开收起按钮
   iconBtn(node, node2, fillNode) {
-    let { color, fill } = this.ctx.mindMap.opt.expandBtnStyle || {
+    let { color, fill, fontSize, fontColor } = this.ctx.mindMap.opt
+      .expandBtnStyle || {
       color: '#808080',
-      fill: '#fff'
+      fill: '#fff',
+      fontSize: 12,
+      strokeColor: '#333333',
+      fontColor: '#333333'
     }
     node.fill({ color: color })
     node2.fill({ color: color })
     fillNode.fill({ color: fill })
+    if (this.ctx.mindMap.opt.isShowExpandNum) {
+      node.attr({ 'font-size': fontSize, 'font-color': fontColor })
+    }
   }
 
   // 是否设置了自定义的样式
   hasCustomStyle() {
     let res = false
-    Object.keys(this.ctx.nodeData.data).forEach((item) => {
+    Object.keys(this.ctx.nodeData.data).forEach(item => {
       if (!nodeDataNoStylePropList.includes(item)) {
         res = true
       }
diff --git a/simple-mind-map/src/core/render/node/nodeExpandBtn.js b/simple-mind-map/src/core/render/node/nodeExpandBtn.js
index 5b2675cd..3fb13f16 100644
--- a/simple-mind-map/src/core/render/node/nodeExpandBtn.js
+++ b/simple-mind-map/src/core/render/node/nodeExpandBtn.js
@@ -3,16 +3,33 @@ import { SVG, Circle, G } from '@svgdotjs/svg.js'
 
 // 创建展开收起按钮的内容节点
 function createExpandNodeContent() {
-  if (this._openExpandNode) {
+  if (this._openExpandNode && !this.mindMap.opt.isShowExpandNum) {
     return
   }
-  let { open, close } = this.mindMap.opt.expandBtnIcon || {}
-  // 展开的节点
-  this._openExpandNode = SVG(open || btnsSvg.open).size(
-    this.expandBtnSize,
-    this.expandBtnSize
-  )
-  this._openExpandNode.x(0).y(-this.expandBtnSize / 2)
+  let { close, open } = this.mindMap.opt.expandBtnIcon || {}
+  // 根据配置判断是否显示数量按钮
+  if (this.mindMap.opt.isShowExpandNum) {
+    // 计算子节点数量
+    let count = this.sumNode(this.nodeData.children)
+    count = this.mindMap.opt.expandBtnNumHandler(count)
+    // 展开的节点
+    this._openExpandNode = SVG()
+      .text(count)
+      .size(this.expandBtnSize, this.expandBtnSize)
+    // 文本垂直居中
+    this._openExpandNode.attr({
+      'text-anchor': 'middle',
+      'dominant-baseline': 'middle',
+      x: this.expandBtnSize / 2,
+      y: 2
+    })
+  } else {
+    this._openExpandNode = SVG(open || btnsSvg.open).size(
+      this.expandBtnSize,
+      this.expandBtnSize
+    )
+    this._openExpandNode.x(0).y(-this.expandBtnSize / 2)
+  }
   // 收起的节点
   this._closeExpandNode = SVG(close || btnsSvg.close).size(
     this.expandBtnSize,
@@ -22,6 +39,7 @@ function createExpandNodeContent() {
   // 填充节点
   this._fillExpandNode = new Circle().size(this.expandBtnSize)
   this._fillExpandNode.x(0).y(-this.expandBtnSize / 2)
+
   // 设置样式
   this.style.iconBtn(
     this._openExpandNode,
@@ -29,7 +47,12 @@ function createExpandNodeContent() {
     this._fillExpandNode
   )
 }
-
+function sumNode(data = []) {
+  return data.reduce(
+    (total, cur) => total + this.sumNode(cur.children || []),
+    data.length
+  )
+}
 //  创建或更新展开收缩按钮内容
 function updateExpandBtnNode() {
   let { expand } = this.nodeData.data
@@ -47,7 +70,18 @@ function updateExpandBtnNode() {
     node = this._closeExpandNode
     this._lastExpandBtnType = true
   }
-  if (this._expandBtn) this._expandBtn.add(this._fillExpandNode).add(node)
+
+  if (this._expandBtn) {
+    // 如果是收起按钮加上边框
+    let opt = this.mindMap.opt
+    if (!expand && opt.isShowExpandNum) {
+      // 数字按钮添加边框
+      this._fillExpandNode.stroke({
+        color: opt.expandBtnStyle.strokeColor
+      })
+    }
+    this._expandBtn.add(this._fillExpandNode).add(node)
+  }
 }
 
 //  更新展开收缩按钮位置
@@ -138,5 +172,6 @@ export default {
   renderExpandBtn,
   removeExpandBtn,
   showExpandBtn,
-  hideExpandBtn
+  hideExpandBtn,
+  sumNode
 }
diff --git a/simple-mind-map/src/plugins/AssociativeLine.js b/simple-mind-map/src/plugins/AssociativeLine.js
index 2a7ebba1..637ba053 100644
--- a/simple-mind-map/src/plugins/AssociativeLine.js
+++ b/simple-mind-map/src/plugins/AssociativeLine.js
@@ -6,7 +6,8 @@ import {
   cubicBezierPath,
   getNodePoint,
   computeNodePoints,
-  getNodeLinePath
+  getNodeLinePath,
+  getDefaultControlPointOffsets
 } from './associativeLine/associativeLineUtils'
 import associativeLineControlsMethods from './associativeLine/associativeLineControls'
 import associativeLineTextMethods from './associativeLine/associativeLineText'
@@ -99,12 +100,31 @@ class AssociativeLine {
   // 创建箭头
   createMarker() {
     return this.draw.marker(20, 20, add => {
-      add.ref(2, 5)
+      add.ref(12, 5)
       add.size(10, 10)
       add.attr('orient', 'auto-start-reverse')
       this.markerPath = add.path('M0,0 L2,5 L0,10 L10,5 Z')
     })
   }
+  // 判断关联线坐标是否变更，有变更则使用变化后的坐标，无则默认坐标
+  updateAllLinesPos(node, toNode, associativeLinePoint) {
+    let [startPoint, endPoint] = computeNodePoints(node, toNode)
+    let nodeRange = 0
+    let nodeDir = 'right'
+    let toNodeRange = 0
+    let toNodeDir = 'right'
+    if (associativeLinePoint.startPoint) {
+      nodeRange = associativeLinePoint.startPoint.range || 0
+      nodeDir = associativeLinePoint.startPoint.dir || 'right'
+      startPoint = getNodePoint(node, nodeDir, nodeRange)
+    }
+    if (associativeLinePoint.endPoint) {
+      toNodeRange = associativeLinePoint.endPoint.range || 0
+      toNodeDir = associativeLinePoint.endPoint.dir || 'right'
+      endPoint = getNodePoint(toNode, toNodeDir, toNodeRange)
+    }
+    return [startPoint, endPoint]
+  }
 
   // 渲染所有连线
   renderAllLines() {
@@ -137,10 +157,17 @@ class AssociativeLine {
       0
     )
     nodeToIds.forEach((ids, node) => {
-      ids.forEach(id => {
+      ids.forEach((id, index) => {
         let toNode = idToNode.get(id)
         if (!node || !toNode) return
-        let [startPoint, endPoint] = computeNodePoints(node, toNode)
+        const associativeLinePoint =
+          node.nodeData.data.associativeLinePoint[index] || {}
+        // 切换结构和布局，都会更新坐标
+        const [startPoint, endPoint] = this.updateAllLinesPos(
+          node,
+          toNode,
+          associativeLinePoint
+        )
         this.drawLine(startPoint, endPoint, node, toNode)
       })
     })
@@ -183,11 +210,28 @@ class AssociativeLine {
       .fill({ color: 'none' })
     clickPath.plot(pathStr)
     // 文字
-    let text = this.createText({ path, clickPath, node, toNode, startPoint, endPoint, controlPoints })
+    let text = this.createText({
+      path,
+      clickPath,
+      node,
+      toNode,
+      startPoint,
+      endPoint,
+      controlPoints
+    })
     // 点击事件
     clickPath.click(e => {
       e.stopPropagation()
-      this.setActiveLine({ path, clickPath, text, node, toNode, startPoint, endPoint, controlPoints })
+      this.setActiveLine({
+        path,
+        clickPath,
+        text,
+        node,
+        toNode,
+        startPoint,
+        endPoint,
+        controlPoints
+      })
     })
     // 渲染关联线文字
     this.renderText(this.getText(node, toNode), path, text)
@@ -195,10 +239,17 @@ class AssociativeLine {
   }
 
   // 激活某根关联线
-  setActiveLine({ path, clickPath, text, node, toNode, startPoint, endPoint, controlPoints }) {
-    let {
-      associativeLineActiveColor
-    } = this.mindMap.themeConfig
+  setActiveLine({
+    path,
+    clickPath,
+    text,
+    node,
+    toNode,
+    startPoint,
+    endPoint,
+    controlPoints
+  }) {
+    let { associativeLineActiveColor } = this.mindMap.themeConfig
     // 如果当前存在激活节点，那么取消激活节点
     if (this.mindMap.renderer.activeNodeList.length > 0) {
       this.clearActiveNodes()
@@ -243,8 +294,10 @@ class AssociativeLine {
 
   // 创建连接线
   createLine(fromNode) {
-    let { associativeLineWidth, associativeLineColor } =
-      this.mindMap.themeConfig
+    let {
+      associativeLineWidth,
+      associativeLineColor
+    } = this.mindMap.themeConfig
     if (this.isCreatingLine || !fromNode) return
     this.isCreatingLine = true
     this.creatingStartNode = fromNode
@@ -279,14 +332,38 @@ class AssociativeLine {
   // 获取转换后的鼠标事件对象的坐标
   getTransformedEventPos(e) {
     let { x, y } = this.mindMap.toPos(e.clientX, e.clientY)
-    let { scaleX, scaleY, translateX, translateY } =
-      this.mindMap.draw.transform()
+    let {
+      scaleX,
+      scaleY,
+      translateX,
+      translateY
+    } = this.mindMap.draw.transform()
     return {
       x: (x - translateX) / scaleX,
       y: (y - translateY) / scaleY
     }
   }
 
+  // 计算节点偏移位置
+  getNodePos(node) {
+    const {
+      scaleX,
+      scaleY,
+      translateX,
+      translateY
+    } = this.mindMap.draw.transform()
+    const { left, top, width, height } = node
+    let translateLeft = left * scaleX + translateX
+    let translateTop = top * scaleY + translateY
+    return {
+      left,
+      top,
+      translateLeft,
+      translateTop,
+      width,
+      height
+    }
+  }
   // 检测当前移动到的目标节点
   checkOverlapNode(x, y) {
     this.overlapNode = null
@@ -336,6 +413,11 @@ class AssociativeLine {
     }
     // 将目标节点id保存起来
     let list = fromNode.nodeData.data.associativeLineTargets || []
+    // 连线节点是否存在相同的id,存在则阻止添加关联线
+    const sameLine = list.some(item => item === id)
+    if (sameLine) {
+      return
+    }
     list.push(id)
     // 保存控制点
     let [startPoint, endPoint] = computeNodePoints(fromNode, toNode)
@@ -358,9 +440,13 @@ class AssociativeLine {
         y: controlPoints[1].y - endPoint.y
       }
     ]
+    let associativeLinePoint = fromNode.nodeData.data.associativeLinePoint || []
+    // 记录关联的起始|结束坐标
+    associativeLinePoint[list.length - 1] = [{ startPoint, endPoint }]
     this.mindMap.execCommand('SET_NODE_DATA', fromNode, {
       associativeLineTargets: list,
-      associativeLineTargetControlOffsets: offsetList
+      associativeLineTargetControlOffsets: offsetList,
+      associativeLinePoint
     })
   }
 
@@ -369,13 +455,17 @@ class AssociativeLine {
     if (!this.activeLine) return
     let [, , , node, toNode] = this.activeLine
     this.removeControls()
-    let { associativeLineTargets, associativeLineTargetControlOffsets, associativeLineText } =
-      node.nodeData.data
+    let {
+      associativeLineTargets,
+      associativeLinePoint,
+      associativeLineTargetControlOffsets,
+      associativeLineText
+    } = node.nodeData.data
     let targetIndex = getAssociativeLineTargetIndex(node, toNode)
     // 更新关联线文本数据
     let newAssociativeLineText = {}
     if (associativeLineText) {
-      Object.keys(associativeLineText).forEach((item) => {
+      Object.keys(associativeLineText).forEach(item => {
         if (item !== toNode.nodeData.data.id) {
           newAssociativeLineText[item] = associativeLineText[item]
         }
@@ -386,6 +476,10 @@ class AssociativeLine {
       associativeLineTargets: associativeLineTargets.filter((_, index) => {
         return index !== targetIndex
       }),
+      // 连接线坐标
+      associativeLinePoint: associativeLinePoint.filter((_, index) => {
+        return index !== targetIndex
+      }),
       // 偏移量
       associativeLineTargetControlOffsets: associativeLineTargetControlOffsets
         ? associativeLineTargetControlOffsets.filter((_, index) => {
diff --git a/simple-mind-map/src/plugins/associativeLine/associativeLineControls.js b/simple-mind-map/src/plugins/associativeLine/associativeLineControls.js
index 105a69ef..22a8dceb 100644
--- a/simple-mind-map/src/plugins/associativeLine/associativeLineControls.js
+++ b/simple-mind-map/src/plugins/associativeLine/associativeLineControls.js
@@ -1,7 +1,7 @@
 import {
   getAssociativeLineTargetIndex,
   joinCubicBezierPath,
-  computeNodePoints,
+  getNodePoint,
   getDefaultControlPointOffsets
 } from './associativeLineUtils'
 
@@ -61,15 +61,23 @@ function onControlPointMousemove(e) {
   }
   // 更新当前拖拽的控制点的位置
   this[this.mousedownControlPointKey].x(x - radius).y(y - radius)
-  let [path, clickPath, text, node, toNode] = this.activeLine
-  let [startPoint, endPoint] = computeNodePoints(node, toNode)
+  let [, , , node, toNode] = this.activeLine
+  let targetIndex = getAssociativeLineTargetIndex(node, toNode)
+  const {
+    associativeLinePoint,
+    associativeLineTargetControlOffsets
+  } = node.nodeData.data
+  const nodePos = this.getNodePos(node)
+  const toNodePos = this.getNodePos(toNode)
+  let [startPoint, endPoint] = this.updateAllLinesPos(
+    node,
+    toNode,
+    associativeLinePoint[targetIndex]
+  )
   this.controlPointMousemoveState.startPoint = startPoint
   this.controlPointMousemoveState.endPoint = endPoint
-  let targetIndex = getAssociativeLineTargetIndex(node, toNode)
   this.controlPointMousemoveState.targetIndex = targetIndex
   let offsets = []
-  let associativeLineTargetControlOffsets =
-    node.nodeData.data.associativeLineTargetControlOffsets
   if (!associativeLineTargetControlOffsets) {
     // 兼容0.4.5版本，没有associativeLineTargetControlOffsets的情况
     offsets = getDefaultControlPointOffsets(startPoint, endPoint)
@@ -80,6 +88,7 @@ function onControlPointMousemove(e) {
   let point2 = null
   // 拖拽的是控制点1
   if (this.mousedownControlPointKey === 'controlPoint1') {
+    startPoint = getNodePoint(nodePos, '', 0, e)
     point1 = {
       x,
       y
@@ -88,10 +97,16 @@ function onControlPointMousemove(e) {
       x: endPoint.x + offsets[1].x,
       y: endPoint.y + offsets[1].y
     }
-    // 更新控制点1的连线
-    this.controlLine1.plot(startPoint.x, startPoint.y, point1.x, point1.y)
+    if (startPoint) {
+      // 保存更新后的坐标
+      associativeLinePoint[targetIndex].startPoint = startPoint
+      this.controlPointMousemoveState.startPoint = startPoint
+      // 更新控制点1的连线
+      this.controlLine1.plot(startPoint.x, startPoint.y, point1.x, point1.y)
+    }
   } else {
     // 拖拽的是控制点2
+    endPoint = getNodePoint(toNodePos, '', 0, e)
     point1 = {
       x: startPoint.x + offsets[0].x,
       y: startPoint.y + offsets[0].y
@@ -100,11 +115,33 @@ function onControlPointMousemove(e) {
       x,
       y
     }
-    // 更新控制点2的连线
-    this.controlLine2.plot(endPoint.x, endPoint.y, point2.x, point2.y)
+    if (endPoint) {
+      // 保存更新后结束节点的坐标
+      associativeLinePoint[targetIndex].endPoint = endPoint
+      this.controlPointMousemoveState.endPoint = endPoint
+      // 更新控制点2的连线
+      this.controlLine2.plot(endPoint.x, endPoint.y, point2.x, point2.y)
+    }
   }
+  this.updataAassociativeLine(
+    startPoint,
+    endPoint,
+    point1,
+    point2,
+    this.activeLine
+  )
+}
+
+function updataAassociativeLine(
+  startPoint,
+  endPoint,
+  point1,
+  point2,
+  activeLine
+) {
+  const [path, clickPath, text] = activeLine
   // 更新关联线
-  let pathStr = joinCubicBezierPath(startPoint, endPoint, point1, point2)
+  const pathStr = joinCubicBezierPath(startPoint, endPoint, point1, point2)
   path.plot(pathStr)
   clickPath.plot(pathStr)
   this.updateTextPos(path, text)
@@ -116,12 +153,18 @@ function onControlPointMouseup(e) {
   if (!this.isControlPointMousedown) return
   e.stopPropagation()
   e.preventDefault()
-  let { pos, startPoint, endPoint, targetIndex } =
-    this.controlPointMousemoveState
+  let {
+    pos,
+    startPoint,
+    endPoint,
+    targetIndex
+  } = this.controlPointMousemoveState
   let [, , , node] = this.activeLine
   let offsetList = []
-  let associativeLineTargetControlOffsets =
-    node.nodeData.data.associativeLineTargetControlOffsets
+  const {
+    associativeLinePoint,
+    associativeLineTargetControlOffsets
+  } = node.nodeData.data
   if (!associativeLineTargetControlOffsets) {
     // 兼容0.4.5版本，没有associativeLineTargetControlOffsets的情况
     offsetList[targetIndex] = getDefaultControlPointOffsets(
@@ -150,7 +193,8 @@ function onControlPointMouseup(e) {
   }
   offsetList[targetIndex] = [offset1, offset2]
   this.mindMap.execCommand('SET_NODE_DATA', node, {
-    associativeLineTargetControlOffsets: offsetList
+    associativeLineTargetControlOffsets: offsetList,
+    associativeLinePoint
   })
   // 这里要加个setTimeout0是因为draw_click事件比mouseup事件触发的晚，所以重置isControlPointMousedown需要等draw_click事件触发完以后
   setTimeout(() => {
@@ -237,5 +281,6 @@ export default {
   renderControls,
   removeControls,
   hideControls,
-  showControls
+  showControls,
+  updataAassociativeLine
 }
diff --git a/simple-mind-map/src/plugins/associativeLine/associativeLineText.js b/simple-mind-map/src/plugins/associativeLine/associativeLineText.js
index 26c31fdb..deb812d9 100644
--- a/simple-mind-map/src/plugins/associativeLine/associativeLineText.js
+++ b/simple-mind-map/src/plugins/associativeLine/associativeLineText.js
@@ -36,7 +36,7 @@ function showEditTextBox(g) {
   this.mindMap.keyCommand.addShortcut('Enter', () => {
     this.hideEditTextBox()
   })
-  
+
   if (!this.textEditNode) {
     this.textEditNode = document.createElement('div')
     this.textEditNode.style.cssText = `position:fixed;box-sizing: border-box;background-color:#fff;box-shadow: 0 0 20px rgba(0,0,0,.5);padding: 3px 5px;margin-left: -5px;margin-top: -3px;outline: none; word-break: break-all;`
@@ -62,7 +62,8 @@ function showEditTextBox(g) {
   ).split(/\n/gim)
   this.textEditNode.style.fontFamily = associativeLineTextFontFamily
   this.textEditNode.style.fontSize = associativeLineTextFontSize * scale + 'px'
-  this.textEditNode.style.lineHeight = textLines.length > 1 ? associativeLineTextLineHeight : 'normal'
+  this.textEditNode.style.lineHeight =
+    textLines.length > 1 ? associativeLineTextLineHeight : 'normal'
   this.textEditNode.style.zIndex = this.mindMap.opt.nodeTextEditZIndex
   this.textEditNode.innerHTML = textLines.join('<br>')
   this.textEditNode.style.display = 'block'
@@ -78,10 +79,12 @@ function onScale() {
 // 更新文本编辑框位置
 function updateTextEditBoxPos(g) {
   let rect = g.node.getBoundingClientRect()
-  this.textEditNode.style.minWidth = rect.width + 10 + 'px'
-  this.textEditNode.style.minHeight = rect.height + 6 + 'px'
-  this.textEditNode.style.left = rect.left + 'px'
-  this.textEditNode.style.top = rect.top + 'px'
+  if (this.textEditNode) {
+    this.textEditNode.style.minWidth = `${rect.width + 10}px`
+    this.textEditNode.style.minHeight = `${rect.height + 6}px`
+    this.textEditNode.style.left = `${rect.left}px`
+    this.textEditNode.style.top = `${rect.top}px`
+  }
 }
 
 //  隐藏文本编辑框
@@ -116,8 +119,10 @@ function getText(node, toNode) {
 // 渲染关联线文字
 function renderText(str, path, text) {
   if (!str) return
-  let { associativeLineTextFontSize, associativeLineTextLineHeight } =
-    this.mindMap.themeConfig
+  let {
+    associativeLineTextFontSize,
+    associativeLineTextLineHeight
+  } = this.mindMap.themeConfig
   text.clear()
   let textArr = str.split(/\n/gim)
   textArr.forEach((item, index) => {
diff --git a/simple-mind-map/src/plugins/associativeLine/associativeLineUtils.js b/simple-mind-map/src/plugins/associativeLine/associativeLineUtils.js
index 018c33b9..b68216e5 100644
--- a/simple-mind-map/src/plugins/associativeLine/associativeLineUtils.js
+++ b/simple-mind-map/src/plugins/associativeLine/associativeLineUtils.js
@@ -54,28 +54,136 @@ export const cubicBezierPath = (x1, y1, x2, y2) => {
   )
 }
 
+export const calcPoint = (node, e) => {
+  const { left, top, translateLeft, translateTop, width, height } = node
+  const clientX = e.clientX
+  const clientY = e.clientY
+  // 中心点的坐标
+  const centerX = translateLeft + width / 2
+  const centerY = translateTop + height / 2
+  const translateCenterX = left + width / 2
+  const translateCenterY = top + height / 2
+  const theta = Math.atan(height / width)
+  // 矩形左上角坐标
+  const deltaX = clientX - centerX
+  const deltaY = centerY - clientY
+  // 方向值
+  const direction = Math.atan2(deltaY, deltaX)
+  // 默认坐标
+  let x = left + width
+  let y = top + height
+  if (direction < theta && direction >= -theta) {
+    // 右边
+    // 正切值 = 对边/邻边，对边 = 正切值*邻边
+    const range = direction * (width / 2)
+    if (direction < theta && direction >= 0) {
+      // 中心点上边
+      y = translateCenterY - range
+    } else if (direction >= -theta && direction < 0) {
+      //  中心点下方
+      y = translateCenterY - range
+    }
+    return {
+      x,
+      y,
+      dir: 'right',
+      range
+    }
+  } else if (direction >= theta && direction < Math.PI - theta) {
+    // 上边
+    y = top
+    let range = 0
+    if (direction < Math.PI / 2 - theta && direction >= theta) {
+      // 正切值 = 对边/邻边，邻边 = 对边/正切值
+      const side = height / 2 / direction
+      range = -side
+      // 中心点右侧
+      x = translateCenterX + side
+    } else if (
+      direction >= Math.PI / 2 - theta &&
+      direction < Math.PI - theta
+    ) {
+      // 中心点左侧
+      const tanValue = (centerX - clientX) / (centerY - clientY)
+      const side = (height / 2) * tanValue
+      range = side
+      x = translateCenterX - side
+    }
+    return {
+      x,
+      y,
+      dir: 'top',
+      range
+    }
+  } else if (direction < -theta && direction >= theta - Math.PI) {
+    // 下边
+    let range = 0
+    if (direction >= theta - Math.PI / 2 && direction < -theta) {
+      // 中心点右侧
+      // 正切值 = 对边/邻边，邻边 = 对边/正切值
+      const side = height / 2 / direction
+      range = side
+      x = translateCenterX - side
+    } else if (
+      direction < theta - Math.PI / 2 &&
+      direction >= theta - Math.PI
+    ) {
+      // 中心点左侧
+      const tanValue = (centerX - clientX) / (centerY - clientY)
+      const side = (height / 2) * tanValue
+      range = -side
+      x = translateCenterX + side
+    }
+    return {
+      x,
+      y,
+      dir: 'bottom',
+      range
+    }
+  }
+  // 左边
+  x = left
+  const tanValue = (centerY - clientY) / (centerX - clientX)
+  const range = tanValue * (width / 2)
+  if (direction >= -Math.PI && direction < theta - Math.PI) {
+    // 中心点右侧
+    y = translateCenterY - range
+  } else if (direction < Math.PI && direction >= Math.PI - theta) {
+    //  中心点左侧
+    y = translateCenterY - range
+  }
+  return {
+    x,
+    y,
+    dir: 'left',
+    range
+  }
+}
 // 获取节点的连接点
-export const getNodePoint = (node, dir = 'right') => {
+export const getNodePoint = (node, dir = 'right', range = 0, e = null) => {
   let { left, top, width, height } = node
+  if (e) {
+    return calcPoint(node, e)
+  }
   switch (dir) {
     case 'left':
       return {
         x: left,
-        y: top + height / 2
+        y: top + height / 2 - range
       }
     case 'right':
       return {
         x: left + width,
-        y: top + height / 2
+        y: top + height / 2 - range
       }
     case 'top':
       return {
-        x: left + width / 2,
+        x: left + width / 2 - range,
         y: top
       }
     case 'bottom':
       return {
-        x: left + width / 2,
+        x: left + width / 2 - range,
         y: top + height
       }
     default:
@@ -111,8 +219,8 @@ export const computeNodePoints = (fromNode, toNode) => {
     toDir = 'bottom'
   } else if (offsetY > 0 && -offsetY < offsetX && offsetY > offsetX) {
     // down
-    fromDir = 'bottom'
-    toDir = 'top'
+    fromDir = 'right'
+    toDir = 'right'
   }
   return [getNodePoint(fromNode, fromDir), getNodePoint(toNode, toDir)]
 }
@@ -179,4 +287,4 @@ export const getDefaultControlPointOffsets = (startPoint, endPoint) => {
       y: controlPoints[1].y - endPoint.y
     }
   ]
-}
\ No newline at end of file
+}