diff --git a/src/common/utils.ts b/src/common/utils.ts
index f9810453e..f46283577 100644
--- a/src/common/utils.ts
+++ b/src/common/utils.ts
@@ -115,6 +115,20 @@ export const getRect = function (context: any, selector: string, needAll: boolea
   });
 };
 
+interface TreeNode {
+  children?: TreeNode[];
+  [key: string]: any;
+}
+
+export const getTreeDepth = (tree: TreeNode[], key?: string) => {
+  return tree.reduce((maxDepth: number, node: TreeNode) => {
+    if (node[key ?? 'children'] && node[key ?? 'children'].length > 0) {
+      return Math.max(maxDepth, getTreeDepth(node[key ?? 'children'], key) + 1);
+    }
+    return Math.max(maxDepth, 1);
+  }, 0);
+};
+
 export const isIOS = function (): boolean {
   return !!(deviceInfo?.system?.toLowerCase().search('ios') + 1);
 };
diff --git a/src/tree-select/tree-select.ts b/src/tree-select/tree-select.ts
index 2be38a764..2a9884987 100644
--- a/src/tree-select/tree-select.ts
+++ b/src/tree-select/tree-select.ts
@@ -1,6 +1,7 @@
 import { SuperComponent, wxComponent } from '../common/src/index';
 import { isDef } from '../common/validator';
 import config from '../common/config';
+import { getTreeDepth } from '../common/utils';
 import props from './props';
 
 import type { TreeOptionData } from '../common/common';
@@ -79,8 +80,10 @@ export default class TreeSelect extends SuperComponent {
           : currentLevelOptions[0];
       }
 
-      // Ensure at least two levels (even if second is empty)
-      if (treeOptions.length === 1) {
+      const depth = getTreeDepth(options, keys?.children);
+
+      // 补齐 treeOptions 长度到 depth
+      while (treeOptions.length < depth) {
         treeOptions.push([]);
         level += 1;
       }