diff --git a/Service/AlarmService.cs b/Service/AlarmService.cs
index 8f45631..5d67072 100644
--- a/Service/AlarmService.cs
+++ b/Service/AlarmService.cs
@@ -52,6 +52,7 @@ namespace LY.App.Service
             {
                 // 排除掉不在范围内的报警信息
                 var O4entity = entity.Where(s => s.device_type == "O4" || s.serial_number == "O4" || s.device_type == "UAV" || !string.IsNullOrEmpty(s.device_type));
+                entity = entity.Where(s => checkDistance(s.drone_lat, s.drone_lon, deviceinfo.Lat, deviceinfo.Lon) == true).ToList();
                 if (O4entity.Any())
                 {
                     foreach (var item in O4entity)
@@ -62,6 +63,7 @@ namespace LY.App.Service
                         }
                     }
                 }
+                entity = entity.Distinct().ToList();
                 if (entity.Any())
                 {
                     foreach (var item in entity)