diff --git a/simple-mind-map/src/Render.js b/simple-mind-map/src/Render.js
index 2b8f9a6c..33a09ca3 100644
--- a/simple-mind-map/src/Render.js
+++ b/simple-mind-map/src/Render.js
@@ -446,6 +446,8 @@ class Render {
                 },
                 "children": []
             })
+            // 插入子节点时自动展开子节点
+            node.nodeData.data.expand = true
             if (node.isRoot) {
                 node.initRender = true
                 // this.mindMap.batchExecution.push('renderNode' + index, () => {