diff --git a/module/gitlab/control.php b/module/gitlab/control.php
index ddbc422eb6..572b99662b 100644
--- a/module/gitlab/control.php
+++ b/module/gitlab/control.php
@@ -72,60 +72,57 @@ class gitlab extends control
     }
 
     /**
-     * bind gitlab user to zentao users.
+     * Bind gitlab user to zentao users.
      *
      * @access public
      * @return void
      */
-    public function bindUser($id)
+    public function bindUser($gitlabID)
     {
+        $userPairs     = $this->loadModel('user')->getPairs();
         if($_POST)
         {
-            if($this->post->zentaoUsers)
+            $users = $this->post->zentaoUsers;
+            $accountList = array();
+            $repeatUsers = array();
+            foreach($users as $openID => $user)
             {
-                if(count($this->post->zentaoUsers) != count(array_unique($this->post->zentaoUsers)))
-                {
-                  $this->send(array('result' => 'fail', 'message' => $this->lang->gitlab->bindUserError, 'locate' => inlink('binduser')));
-                }
-
-                $data = array();
-                $number = 0;
-                foreach($this->post->zentaoUsers as $gitlabId => $account)
-                {
-                   if($account)
-                    {
-                      $data[$number]['openID']       = $gitlabId;
-                      $data[$number]['account']      = $account;
-                      $data[$number]['providerType'] = 'gitlab';
-                      $data[$number]['providerID']   = $id;
-                      $number++;
-                    }
-                }
+                if(empty($user)) continue;
+                if(isset($accountList[$user])) $repeatUsers[] = zget($userPairs, $user);
+                $accountList[$user] = $openID;
             }
 
-            foreach($data as $bindUser)
+            if(count($repeatUsers)) $this->send(array('result' => 'fail', 'message' => sprintf($this->lang->gitlab->bindUserError, join(',', $repeatUsers))));
+
+            $user = new stdclass;
+            $user->providerID   = $gitlabID;
+            $user->providerType = 'gitlab';
+
+            foreach($users as $openID => $account)
             {
-                if(!$this->gitlab->checkAccountId($bindUser['openID'],$bindUser['providerID']))
-                {
-                  $this->dao->insert(TABLE_OAUTH)->data($bindUser)->exec();
-                  if(dao::isError()) $this->send(array('result' => 'fail', 'message' => dao::getError()));
-                  $this->send(array('result' => 'success', 'message' => $this->lang->saveSuccess, 'locate' => inlink('binduser')));
-                }else
-                {
-                  $this->dao->update(TABLE_OAUTH)->data($bindUser)->where('openID')->eq($bindUser['openID'])->andWhere('providerID')->eq($bindUser['providerID'])->exec();
-                  if(dao::isError()) $this->send(array('result' => 'fail', 'message' => dao::getError()));
-                  $this->send(array('result' => 'success', 'message' => $this->lang->saveSuccess, 'locate' => inlink('binduser')));
-                }
+                if(!$account) continue;
+                $user->account = $account;
+                $user->openID  = $openID;
+
+                $this->dao->delete(TABLE_OAUTH)
+                          ->where('openID')->eq($user->openID)
+                          ->andWhere('providerType')->eq('gitlab')
+                          ->andWhere('providerID')->eq($id)
+                          ->andWhere('account')->eq($user->account)
+                          ->exec();
+
+                $this->dao->insert(TABLE_OAUTH)->data($user)->exec();
             }
+            $this->send(array('result' => 'success', 'message' => $this->lang->saveSuccess, 'locate' => $this->sever->http_referer));
         }
 
-        $gitlab      = $this->gitlab->getByID($id);
+        $gitlab      = $this->gitlab->getByID($gitlabID);
         $zentaoUsers = $this->dao->select('account,email,realname')->from(TABLE_USER)->fetchAll('account');
 
         $this->view->title         = $this->lang->gitlab->bindUser;
-        $this->view->userPairs     = $this->loadModel('user')->getPairs();
+        $this->view->userPairs     = $userPairs;
         $this->view->gitlabUsers   = $this->gitlab->apiGetUsers($gitlab);
-        $this->view->matchedResult = $this->gitlab->getMatchedUsers($this->view->gitlabUsers, $zentaoUsers);
+        $this->view->matchedResult = $this->gitlab->getMatchedUsers($gitlabID, $this->view->gitlabUsers, $zentaoUsers);
         $this->display();
     }
 
diff --git a/module/gitlab/lang/zh-cn.php b/module/gitlab/lang/zh-cn.php
index 8f1a3ecd4a..bd77ff6bc6 100644
--- a/module/gitlab/lang/zh-cn.php
+++ b/module/gitlab/lang/zh-cn.php
@@ -29,4 +29,4 @@ $lang->gitlab->gitlabTokenTips     = "请填写具有admin权限账户的access
 
 $lang->gitlab->tokenError    = "当前token非管理员权限。";
 $lang->gitlab->hostError     = "无效的gitlab服务地址。";
-$lang->gitlab->bindUserError = "禅道用户绑定gitlab服务号失败";
+$lang->gitlab->bindUserError = "不能重复绑定用户 %s";
diff --git a/module/gitlab/model.php b/module/gitlab/model.php
index d20a815ae3..bc2bb9e2d7 100644
--- a/module/gitlab/model.php
+++ b/module/gitlab/model.php
@@ -123,7 +123,7 @@ class gitlabModel extends model
      * @access public
      * @return array
      */
-    public function getMatchedUsers($gitlabUsers, $zentaoUsers)
+    public function getMatchedUsers($gitlabID, $gitlabUsers, $zentaoUsers)
     {
         $matches = new stdclass;
         foreach($gitlabUsers as $gitlabUser)
@@ -136,11 +136,21 @@ class gitlabModel extends model
             }
         }
             
-        /*Get binded users from db.*/
+        $bindedUsers = $this->dao->select('openID,account')->from(TABLE_OAUTH)
+                                 ->where('providerType')->eq('gitlab')
+                                 ->andWhere('providerID')->eq($gitlabID)
+                                 ->fetchPairs();
 
         $matchedUsers = array();
         foreach($gitlabUsers as $gitlabUser)
         {
+            if(isset($bindedUsers[$gitlabUser->id])) 
+            {
+                $gitlabUser->zentaoAccount = $bindedUsers[$gitlabUser->id];
+                $matchedUsers[] = $gitlabUser;
+                continue;
+            }
+
             $matchedZentaoUsers = array();
             if(isset($matches->accounts[$gitlabUser->account])) $matchedZentaoUsers = array_merge($matchedZentaoUsers, $matches->accounts[$gitlabUser->account]);
             if(isset($matches->emails[$gitlabUser->email]))     $matchedZentaoUsers = array_merge($matchedZentaoUsers, $matches->emails[$gitlabUser->email]);
@@ -196,19 +206,6 @@ class gitlabModel extends model
         return $gitlab_url; 
     }
 
-
-    /**
-     * check if gitlab id exists
-     * 
-     * @param  string
-     * @access public
-     * @return array
-     */
-    public function checkAccountId($openID,$providerID)
-    {
-        return $this->dao->select('openID')->from(TABLE_OAUTH)->where('openID')->eq($openID)->andWhere('providerID')->eq($providerID)->fetch('openID'); 
-    }
-
     /**
      * Get hooks.
      * 
diff --git a/module/gitlab/view/binduser.html.php b/module/gitlab/view/binduser.html.php
index 380a0550c6..a0cf0dd17f 100644
--- a/module/gitlab/view/binduser.html.php
+++ b/module/gitlab/view/binduser.html.php
@@ -15,7 +15,7 @@
   <div class="main-header">
     <h2><?php echo $lang->gitlab->bindUser;?></h2>
   </div>
-  <form method='post' class='load-indicator main-form' enctype='multipart/form-data'>
+  <form method='post' class='load-indicator main-form form-ajax' enctype='multipart/form-data'>
     <div class="table-responsive">
       <table class="table table-borderless w-600px">
         <thead>