diff --git a/Common/DateTimeHelper.cs b/Common/DateTimeHelper.cs
new file mode 100644
index 0000000..c6b1c8d
--- /dev/null
+++ b/Common/DateTimeHelper.cs
@@ -0,0 +1,23 @@
+namespace LY.App.Common
+{
+    /// <summary>
+    /// 日期时间帮助类
+    /// </summary>
+    public static class DateTimeHelper
+    {
+
+        /// <summary>
+        ///         //当前剩余秒数
+        /// </summary>
+        /// <returns></returns>
+        public static int GetRemainSeconds()
+        {
+            // 当前时间
+            DateTime now = DateTime.Now;
+            // 当天结束时间（23:59:59.999）
+            DateTime endOfDay = now.Date.AddDays(1).AddTicks(-1);
+            int remainSeconds = (int)(endOfDay - DateTime.Now).TotalSeconds;
+            return remainSeconds;
+        }
+    }
+}
diff --git a/Controllers/HomeController.cs b/Controllers/HomeController.cs
index c63b487..963c047 100644
--- a/Controllers/HomeController.cs
+++ b/Controllers/HomeController.cs
@@ -1,4 +1,5 @@
-using LY.App.Common.Redis;
+using LY.App.Common;
+using LY.App.Common.Redis;
 using LY.App.Device;
 using LY.App.Model;
 using LY.App.Service;
@@ -48,7 +49,7 @@ namespace LY.App.Controllers
             var positions = await _positionService.Index();
             var alarmCount = await _redisService.GetOrSetAsync(RedisKeyList.index_data(),
                    async () => await _alarmService.IndexCount(),
-                   TimeSpan.FromDays(1));
+                   TimeSpan.FromSeconds(DateTimeHelper.GetRemainSeconds()));
             var weather = await _redisService.GetOrSetAsync(RedisKeyList.Index_Weather,
                    async () => await _weatherService.GetWeather(),
                    TimeSpan.FromHours(3));