diff --git a/app/admin/controller/auth/Admin.php b/app/admin/controller/auth/Admin.php
index 9850ccc..30177af 100644
--- a/app/admin/controller/auth/Admin.php
+++ b/app/admin/controller/auth/Admin.php
@@ -34,9 +34,31 @@ class Admin extends Backend
 
     protected string $dataLimitField = 'id';
 
+    protected Tree $tree;
+
+    protected array $initValue = [];
+
+    protected string $keyword = '';
+
+    protected bool $assembleTree = false;
+
     protected function initController(Request $request): ?Response
     {
         $this->model = new AdminModel();
+        $this->tree  = Tree::instance();
+
+        $isTree    = $request->get('isTree') ?? $request->post('isTree') ?? false;
+        $initValue = $request->get('initValue') ?? $request->post('initValue') ?? [];
+        if (is_array($initValue)) {
+            $this->initValue = array_filter($initValue);
+        } elseif ($initValue !== null && $initValue !== '') {
+            $this->initValue = array_filter(explode(',', (string) $initValue));
+        } else {
+            $this->initValue = [];
+        }
+        $this->keyword = (string) ($request->get('quickSearch') ?? $request->post('quickSearch') ?? '');
+        $this->assembleTree = ($isTree === true || $isTree === '1' || $isTree === 1) && $this->initValue === [];
+
         return null;
     }
 
@@ -596,7 +618,50 @@ class Admin extends Backend
 
     public function select(Request $request): Response
     {
-        return parent::select($request);
+        $response = $this->initializeBackend($request);
+        if ($response !== null) {
+            return $response;
+        }
+
+        $rows = $this->getAdminsForSelect($request);
+        if ($this->assembleTree) {
+            $treeData = $this->tree->assembleChild($rows, 'pid', 'id');
+            $rows     = $this->tree->assembleTree($this->tree->getTreeArray($treeData, 'username'));
+        }
+
+        return $this->success('', [
+            'options' => $rows,
+        ]);
+    }
+
+    /**
+     * @return array<int, array<string, mixed>>
+     */
+    private function getAdminsForSelect(Request $request): array
+    {
+        list($where, $alias, $limit, $order) = $this->queryBuilder();
+        $adminAlias = $alias[strtolower($this->model->getTable())] ?? 'admin';
+
+        $query = $this->model
+            ->withoutField('login_failure,password,salt')
+            ->alias($alias)
+            ->where($where);
+
+        $visibleIds = AdminCommissionDistributionService::getVisibleAdminIdsForOperator(
+            intval($this->auth->id),
+            $this->auth->isSuperAdmin()
+        );
+        if ($visibleIds !== []) {
+            $query->where($adminAlias . '.id', 'in', $visibleIds);
+        }
+
+        $rows = $query->order($order)->select()->toArray();
+        foreach ($rows as $k => $row) {
+            $parentId = intval($row['parent_admin_id'] ?? 0);
+            $rows[$k]['pid'] = $parentId > 0 ? $parentId : 0;
+        }
+
+        return $rows;
     }
 
     private function checkGroupAuth(array $groups): ?Response
diff --git a/web/src/views/backend/auth/admin/popupForm.vue b/web/src/views/backend/auth/admin/popupForm.vue
index f777857..b989960 100644
--- a/web/src/views/backend/auth/admin/popupForm.vue
+++ b/web/src/views/backend/auth/admin/popupForm.vue
@@ -74,11 +74,13 @@
                         v-model="baTable.form.items!.parent_admin_id"
                         type="remoteSelect"
                         prop="parent_admin_id"
+                        :key="'parent-' + (baTable.form.items!.channel_id ?? '') + '-' + baTable.form.items!.id"
                         :input-attr="{
                             remoteUrl: '/admin/auth.Admin/index',
                             field: 'username',
                             pk: 'id',
                             disabled: isTopLevelGroup,
+                            pagination: false,
                             params: parentSelectParams,
                             placeholder: t('auth.admin.Parent admin placeholder'),
                         }"
@@ -217,7 +219,7 @@ const showShareRateField = computed(() => {
 })
 
 const parentSelectParams = computed(() => {
-    const params: anyObj = { select: true, limit: 200 }
+    const params: anyObj = { isTree: true }
     const cid = baTable.form.items?.channel_id
     if (cid !== null && cid !== undefined && cid !== '') {
         params['search[0][field]'] = 'channel_id'