diff --git a/car-base-server/src/main/java/com/god/base/server/util/Md5Util.java b/car-base-server/src/main/java/com/god/base/server/util/Md5Util.java
index 6d14562..2ec0528 100644
--- a/car-base-server/src/main/java/com/god/base/server/util/Md5Util.java
+++ b/car-base-server/src/main/java/com/god/base/server/util/Md5Util.java
@@ -14,7 +14,7 @@ public class Md5Util {
     public static String  md5(GetTopicReq getTopicReq) {
         try {
             java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
-            String str = getTopicReq.getTimeString() + getTopicReq.getUserName() + getTopicReq.getRandomStr() + getTopicReq.getCarVin();
+            String str = getTopicReq.getTimeString() + getTopicReq.getUserName() + getTopicReq.getRandomStr() + getTopicReq.getVin();
             byte[] array = md.digest(str.getBytes());
             StringBuffer sb = new StringBuffer();
             for (int i = 0; i < array.length; ++i) {