diff --git a/src/main/java/com/sunyard/SydApiException.java b/src/main/java/com/sunyard/SydApiException.java
index 4b822e3..3482948 100644
--- a/src/main/java/com/sunyard/SydApiException.java
+++ b/src/main/java/com/sunyard/SydApiException.java
@@ -80,15 +80,15 @@ public class SydApiException extends RuntimeException{
                 break;
 
             case 40000:
-                this.msg = "输入的大数据处理异常";
+                msg = "输入的大数据处理异常";
                 break;
-                
+
             case 56300:
-                this.msg = "证书导入错误";
+                msg = "证书导入错误";
                 break;
-                
+
             case 56307:
-                this.msg = "证书删除错误";
+                msg = "证书删除错误";
 				break;
 
             default: