diff --git a/webapp/controller/BagController.class.php b/webapp/controller/BagController.class.php
index f6533871..91faca50 100644
--- a/webapp/controller/BagController.class.php
+++ b/webapp/controller/BagController.class.php
@@ -180,6 +180,12 @@ class BagController extends BaseAuthedController {
             $errMsg = 'Parameter error name length must not be greater than 16';
             return;
         }
+        if(!preg_match("/^[a-z\d]*$/i",$name))
+        {
+            $errCode = 5;
+            $errMsg = 'Excuse me , the name you entered is in the wrong format.';
+            return;
+        }
         $nameService = new services\NameService();
         if (!$nameService->verifyNameSign($name, $nameSign)){
             $errCode = 5;