diff --git a/QYMessageCenter.Business/MessageBusiness.cs b/QYMessageCenter.Business/MessageBusiness.cs
index 0bc7465..50d13f8 100644
--- a/QYMessageCenter.Business/MessageBusiness.cs
+++ b/QYMessageCenter.Business/MessageBusiness.cs
@@ -21,7 +21,7 @@ namespace QYMessageCenter.Business
         public MessageBusiness(IFreeSql fsql, NLogManager nLogManager, IIdGenerator idGenerator, RestApiService restApiService, IMemoryCache memoryCache) : base(fsql, nLogManager, idGenerator, restApiService)
         {
             this.memoryCache = memoryCache;
-            this.msgCacheTimeSpan = new TimeSpan(12, 0, 0);
+            this.msgCacheTimeSpan = new TimeSpan(1, 0, 0);
         }
 
         /// <summary>