diff --git a/GTClient.php b/GTClient.php
index 7cb98fa..9341809 100644
--- a/GTClient.php
+++ b/GTClient.php
@@ -90,7 +90,9 @@ public function __construct($domainUrl, $appkey, $appId, $masterSecret, $ssl = N
         }
         //鉴权
         try {
-            $this->auth();
+            if (empty($this->authToken)) {
+                $this->auth();
+            }
         } catch (Exception $e) {
             echo  $e->getMessage();
         }