diff --git a/module/extension/control.php b/module/extension/control.php
index 74de34681c..af9f8f01c8 100644
--- a/module/extension/control.php
+++ b/module/extension/control.php
@@ -11,6 +11,26 @@
  */
 class extension extends control
 {
+    /**
+     * Construct function.
+     * 
+     * @param  string $moduleName 
+     * @param  string $methodName 
+     * @access public
+     * @return void
+     */
+    public function __construct($moduleName = '', $methodName = '')
+    {
+        parent::__construct($moduleName, $methodName);
+
+        $statusFile = $this->loadModel('common')->checkSafeFile();
+        if($statusFile)
+        {
+            $this->view->error = sprintf($this->lang->extension->noticeOkFile, str_replace('\\', '/', $statusFile));
+            die($this->display('extension', 'safe'));
+        }
+    }
+
     /**
      * Browse extensions.
      *
diff --git a/module/extension/view/safe.html.php b/module/extension/view/safe.html.php
new file mode 100644
index 0000000000..284d670832
--- /dev/null
+++ b/module/extension/view/safe.html.php
@@ -0,0 +1,15 @@
+<?php
+/**
+ * The browse view file of extension module of ZenTaoPMS.
+ *
+ * @copyright   Copyright 2009-2015 青岛易软天创网络科技有限公司(QingDao Nature Easy Soft Network Technology Co,LTD, www.cnezsoft.com)
+ * @license     ZPL (http://zpl.pub/page/zplv12.html)
+ * @author      Chunsheng Wang <chunsheng@cnezsoft.com>
+ * @package     extension
+ * @version     $Id$
+ * @link        http://www.zentao.net
+ */
+?>
+<?php include '../../common/view/header.html.php';?>
+<div id='mainContent' class='main-content'><?php echo $error;?></div>
+<?php include '../../common/view/footer.html.php';?>