diff --git a/apps/server/src/integration/dingtalk.service.ts b/apps/server/src/integration/dingtalk.service.ts
index ea6226c..4f3811a 100644
--- a/apps/server/src/integration/dingtalk.service.ts
+++ b/apps/server/src/integration/dingtalk.service.ts
@@ -258,41 +258,6 @@ export class DingTalkService {
     return ids;
   }
 
-  /**
-   * BFS from rootDeptId=1, returns depth of every department.
-   * Depth is 1-based (root=1). Uses listsubid API only, no detail fetches.
-   */
-  private async getDeptDepthMap(token: string): Promise<Map<number, number>> {
-    const depthMap = new Map<number, number>();
-    const queue: Array<{ id: number; depth: number }> = [{ id: 1, depth: 1 }];
-
-    while (queue.length > 0) {
-      const { id, depth } = queue.shift()!;
-      depthMap.set(id, depth);
-
-      try {
-        await this.rateLimit();
-        const res = await fetch(
-          `https://oapi.dingtalk.com/topapi/v2/department/listsubid?access_token=${token}`,
-          {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({ dept_id: id }),
-          },
-        );
-        const body: SubDeptIdListResponse = await res.json();
-        if (body.errcode === 0 && body.result?.dept_id_list) {
-          for (const childId of body.result.dept_id_list) {
-            queue.push({ id: childId, depth: depth + 1 });
-          }
-        }
-      } catch (e) {
-        this.logger.error(`getDeptDepthMap 获取部门 ${id} 子部门失败: ${(e as Error).message}`);
-      }
-    }
-
-    return depthMap;
-  }
 
   // ═══════════════════════════════════════════
   // Department detail
@@ -511,36 +476,21 @@ export class DingTalkService {
     }
     const token = await this.getAccessToken();
 
-    // Compute global depth map (always from rootDeptId=1)
-    const depthMap = await this.getDeptDepthMap(token);
-    const maxDepth = Math.max(...depthMap.values());
-
-    // Get subtree IDs for the user's selected root
-    const subtreeIds = await this.getAllDeptIds(token, rootDeptId);
-
-    // Filter: only keep departments at the deepest 2 levels of the global tree
-    const filteredIds = subtreeIds.filter((id) => {
-      const d = depthMap.get(id) ?? -1;
-      return d === maxDepth || d === maxDepth - 1;
-    });
-
-    if (filteredIds.length === 0) {
-      return [];
-    }
+    const deptIds = await this.getAllDeptIds(token, rootDeptId);
 
     // 拉每个部门详情
     const nodes: DingOrgTreeNodeWithUsers[] = [];
     // Before dedup: collect deptIds per user
     const userDeptMap = new Map<string, number[]>();
 
-    for (let i = 0; i < filteredIds.length; i++) {
+    for (let i = 0; i < deptIds.length; i++) {
       if (i > 0) await this.delay(i);
-      const detail = await this.getDeptDetail(token, filteredIds[i]);
+      const detail = await this.getDeptDetail(token, deptIds[i]);
       if (!detail) continue;
 
       // 拉该部门下的用户
-      const dingUsers = await this.getDeptUsers(token, filteredIds[i]);
-      this.logger.log(`[dingtalk] dept ${filteredIds[i]} (${detail.name}): ${dingUsers.length} users`);
+      const dingUsers = await this.getDeptUsers(token, deptIds[i]);
+      this.logger.log(`[dingtalk] dept ${deptIds[i]} (${detail.name}): ${dingUsers.length} users`);
 
       nodes.push({
         id: detail.dept_id,
@@ -585,7 +535,7 @@ export class DingTalkService {
     const roots: DingOrgTreeNodeWithUsers[] = [];
     for (const node of nodes) {
       const parent = map.get(node.parentId);
-      if (parent) {
+      if (parent && node.id !== rootDeptId) {
         parent.children.push(node);
       } else {
         roots.push(node);