diff --git a/service/app/admin/controller/QaController.php b/service/app/admin/controller/QaController.php
index a9ba518f..95e4117e 100644
--- a/service/app/admin/controller/QaController.php
+++ b/service/app/admin/controller/QaController.php
@@ -103,7 +103,7 @@ class QaController extends base
     {
         $post = $request->post();
         if (empty($post['id'])) return $this->error(2001, 'id data cannot be empty!');
-        $qaQuestion = $post['qaQuestions'];
+        $qaQuestion = $post['qaQuestions'] ?? null;
         unset($post['create_time']);
         unset($post['update_time']);
         unset($post['qaQuestions']);