diff --git a/library/think/Request.php b/library/think/Request.php
index f4c6a84c..d4deb6f2 100644
--- a/library/think/Request.php
+++ b/library/think/Request.php
@@ -191,7 +191,8 @@ class Request
         $options['cookie']      = $cookie;
         $options['file']        = $files;
         $options['server']      = $server;
-        return new self($options);
+        self::$instance         = new self($options);
+        return self::$instance;
     }
 
     /**