diff --git a/simple-mind-map/src/core/render/node/Node.js b/simple-mind-map/src/core/render/node/Node.js
index eaec8d8d..ffbc12b4 100644
--- a/simple-mind-map/src/core/render/node/Node.js
+++ b/simple-mind-map/src/core/render/node/Node.js
@@ -572,9 +572,10 @@ class Node {
     }
     this.updateNodeActiveClass()
     let { alwaysShowExpandBtn } = this.mindMap.opt
+    const childrenLength = this.nodeData.children.length
     if (alwaysShowExpandBtn) {
       // 需要移除展开收缩按钮
-      if (this._expandBtn && this.nodeData.children.length <= 0) {
+      if (this._expandBtn && childrenLength <= 0) {
         this.removeExpandBtn()
       } else {
         // 更新展开收起按钮
@@ -583,7 +584,9 @@ class Node {
     } else {
       let { isActive, expand } = this.getData()
       // 展开状态且非激活状态，且当前鼠标不在它上面，才隐藏
-      if (expand && !isActive && !this._isMouseenter) {
+      if (childrenLength <= 0) {
+        this.removeExpandBtn()
+      } else if (expand && !isActive && !this._isMouseenter) {
         this.hideExpandBtn()
       } else {
         this.showExpandBtn()