diff --git a/platform/AliyunFC.php b/platform/AliyunFC.php
index 3c83298..d50114a 100644
--- a/platform/AliyunFC.php
+++ b/platform/AliyunFC.php
@@ -38,10 +38,8 @@ function GetPathSetting($event, $context)
     $_SERVER['region'] = $context['region'];
     $_SERVER['service_name'] = $context['service']['name'];
     $_SERVER['function_name'] = $context['function']['name'];
-
-        $_SERVER['base_path'] = $event['requestURI'];
-        $path = $event['path'];
-        //$path = spurlencode($path, '/');
+    $path = $event['path'];
+    $_SERVER['base_path'] = substr($event['requestURI'], 0, -strlen($path)+1);
 
     if (substr($path,-1)=='/') $path=substr($path,0,-1);
     $_SERVER['is_guestup_path'] = is_guestup_path($path);