diff --git a/WarehouseMgr/Tnb.WarehouseMgr/Extensions/BackgroundServiceExtensions.cs b/WarehouseMgr/Tnb.WarehouseMgr/Extensions/BackgroundServiceExtensions.cs
new file mode 100644
index 00000000..f640130e
--- /dev/null
+++ b/WarehouseMgr/Tnb.WarehouseMgr/Extensions/BackgroundServiceExtensions.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Spire.Pdf.Widget;
+
+namespace Tnb.WarehouseMgr
+{
+    public static class BackgroundServiceExtensions
+    {
+        public static IServiceCollection AddTimedTaskService(this IServiceCollection services)
+        {
+            return services.AddSingleton<BackgroundService, TimedTaskBackgroundService>();
+        }
+    }
+}
diff --git a/apihost/Tnb.API.Entry/Startup.cs b/apihost/Tnb.API.Entry/Startup.cs
index 380d5a41..8648bffd 100644
--- a/apihost/Tnb.API.Entry/Startup.cs
+++ b/apihost/Tnb.API.Entry/Startup.cs
@@ -65,8 +65,8 @@ public class Startup : AppStartup
         //注册任务消息通知 added by ly on 20230814
         services.AddTaskMessageNotify();
 
-        services.AddSingleton<BackgroundService, TimedTaskBackgroundService>();
         //定时任务
+        services.AddTimedTaskService();
         //services.AddHostedService<TimedTaskBackgroundService>();
 
     }