diff --git a/simple-mind-map/src/core/render/node/Node.js b/simple-mind-map/src/core/render/node/Node.js
index 45a92a9c..5737fb25 100644
--- a/simple-mind-map/src/core/render/node/Node.js
+++ b/simple-mind-map/src/core/render/node/Node.js
@@ -903,7 +903,7 @@ class Node {
   }
 
   //  检测当前节点是否是某个节点的祖先节点
-  isParent(node) {
+  isAncestor(node) {
     if (this.uid === node.uid) {
       return false
     }
diff --git a/simple-mind-map/src/plugins/Drag.js b/simple-mind-map/src/plugins/Drag.js
index 9752022f..9640f501 100644
--- a/simple-mind-map/src/plugins/Drag.js
+++ b/simple-mind-map/src/plugins/Drag.js
@@ -677,7 +677,7 @@ class Drag extends Base {
   // 检查某个节点是否在被拖拽节点内
   checkIsInBeingDragNodeList(node) {
     return !!this.beingDragNodeList.find(item => {
-      return item.uid === node.uid || item.isParent(node)
+      return item.uid === node.uid || item.isAncestor(node)
     })
   }
 }
diff --git a/simple-mind-map/src/utils/index.js b/simple-mind-map/src/utils/index.js
index 6c4684bb..eac4b3de 100644
--- a/simple-mind-map/src/utils/index.js
+++ b/simple-mind-map/src/utils/index.js
@@ -713,7 +713,7 @@ export const getTopAncestorsFomNodeList = list => {
   list.forEach(node => {
     if (
       !list.find(item => {
-        return item.uid !== node.uid && item.isParent(node)
+        return item.uid !== node.uid && item.isAncestor(node)
       })
     ) {
       res.push(node)
@@ -728,7 +728,7 @@ export const checkHasSupSubRelation = list => {
     const cur = list[i]
     if (
       list.find(item => {
-        return item.uid !== cur.uid && cur.isParent(item)
+        return item.uid !== cur.uid && cur.isAncestor(item)
       })
     ) {
       return true