diff --git a/app/controller/Crawler.php b/app/controller/Crawler.php
index 62b25a9..f28dc6d 100644
--- a/app/controller/Crawler.php
+++ b/app/controller/Crawler.php
@@ -341,16 +341,25 @@ class Crawler extends BaseController
             $treeData = $service->getPositionTree($dsdm, $examid, $bmid, $userid, (string)$aa, $cookies);
 
             $zwdmList = [];
-            if (is_array($treeData)) {
-                foreach ($treeData as $item) {
-                    if (isset($item['CODE']) && !empty($item['CODE'])) {
-                        // 跳过包含 nocheck: true 的节点（如分组节点，不参与爬取）
-                        if (!empty($item['nocheck'])) {
-                            continue;
+            $collectCodes = function (array $nodes) use (&$collectCodes, &$zwdmList) {
+                foreach ($nodes as $item) {
+                    // 跳过包含 nocheck: true 的节点（如分组节点，不参与爬取）
+                    if (!empty($item['nocheck'])) {
+                        if (!empty($item['children']) && is_array($item['children'])) {
+                            $collectCodes($item['children']);
                         }
+                        continue;
+                    }
+                    if (isset($item['CODE']) && $item['CODE'] !== '') {
                         $zwdmList[] = $item['CODE'];
                     }
+                    if (!empty($item['children']) && is_array($item['children'])) {
+                        $collectCodes($item['children']);
+                    }
                 }
+            };
+            if (is_array($treeData)) {
+                $collectCodes($treeData);
             }
 
             if (empty($zwdmList)) {