diff --git a/xhpc-modules/xhpc-message-board/src/main/java/com/xhpc/board/service/impl/XhpcMessageBoardServiceImpl.java b/xhpc-modules/xhpc-message-board/src/main/java/com/xhpc/board/service/impl/XhpcMessageBoardServiceImpl.java
index 88e0d033..91d0686d 100644
--- a/xhpc-modules/xhpc-message-board/src/main/java/com/xhpc/board/service/impl/XhpcMessageBoardServiceImpl.java
+++ b/xhpc-modules/xhpc-message-board/src/main/java/com/xhpc/board/service/impl/XhpcMessageBoardServiceImpl.java
@@ -61,13 +61,13 @@ public class XhpcMessageBoardServiceImpl implements XhpcMessageBoardService {
         //使用Redis判断消息发送是否大于5分钟：
         Object cacheObject = redisService.getCacheObject(userRedisKey);
         String currentTime;
+        String platformRedisKey = "PlatformMessageValidTime:" + userMessage.getTenantType() + ":" + userMessage.getTenantId() + ":" + loginUser.getUserType() + ":" + loginUser.getUsername();
         if (cacheObject == null) {
             //设置当前时间
             currentTime = DateUtil.getYyyyMmDdHhMmSs();
             redisService.setCacheObject(userRedisKey, currentTime);
             redisService.expire(userRedisKey, 60 * 5);
             //设置平台RedisKey的有效时间，保证双方时间数据同步
-            String platformRedisKey = "PlatformMessageValidTime:" + userMessage.getTenantType() + ":" + userMessage.getTenantId() + ":" + loginUser.getUserType() + ":" + loginUser.getUsername();
             redisService.setCacheObject(platformRedisKey, currentTime);
             redisService.expire(platformRedisKey, 60 * 5);
             userMessage.setSendMessageTime(currentTime);
@@ -92,6 +92,7 @@ public class XhpcMessageBoardServiceImpl implements XhpcMessageBoardService {
         } else {
             //reset redis key valid time
             redisService.expire(userRedisKey, 60 * 5);
+            redisService.expire(platformRedisKey, 60 * 5);
             currentTime = (String) cacheObject;
             userMessage.setSendMessageTime(currentTime);
             //设置用户账号，用户类型