diff --git a/application/controllers/User.php b/application/controllers/User.php
index 166fe2b..5d2f0e8 100644
--- a/application/controllers/User.php
+++ b/application/controllers/User.php
@@ -147,7 +147,7 @@ function register($code = null)
     function do_register()
     {
         $username = $this->input->post('username');
-        if ( strlen($username)<7||strlen($username)>32 )
+        if ( strlen($username)<6 || strlen($username)>32 )
         {
             echo '{"result" : "用户名不合法！" }';
             return;