diff --git a/controllers/auth2.go b/controllers/auth2.go
index 0c3714851..ed9b7aec4 100644
--- a/controllers/auth2.go
+++ b/controllers/auth2.go
@@ -219,7 +219,7 @@ func (c *Auth2Controller) WeixinMPOAuth2() {
 			}
 		}
 		if strings.Contains(params.Block,"?"){
-			params.Block = params.Block[:strings.LastIndex("?", params.Block)]
+			params.Block = params.Block[:strings.LastIndex(params.Block,"?" )]
 			fmt.Println("params.Block", params.Block)
 		}
 		redirectURL = fmt.Sprintf("%s?info=%s", params.Block, base64.StdEncoding.EncodeToString(utils.MustMarshal(callResult)))