diff --git a/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs b/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs
index 6932bf71..e619304b 100644
--- a/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs
+++ b/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs
@@ -51,7 +51,7 @@ public class AssignmentService : IAssignmentService
              .WhereIF(request.DeviceUniqueNo.IsPresent(), (deviceTask, deivce) => deviceTask.DeviceUniqueNo == request.DeviceUniqueNo)
              .WhereIF(request.Types.IsPresent(), deviceTask => request.Types.Contains(deviceTask.Type))
              .WhereIF(!request.IsProcess, deviceTask => deviceTask.Status == DeviceTaskStatusEnumType.Wait)
-             .WhereIF(request.IsProcess, deviceTask => deviceTask.Status == DeviceTaskStatusEnumType.Process)
+             .WhereIF(request.IsProcess, deviceTask => deviceTask.Status == DeviceTaskStatusEnumType.Process && SqlFunc.DateDiff(DateType.Minute, deviceTask.CreateTime, deviceTask.ModifiedTime) > 30)
              //.Where(deviceTask => heartbeatDeviceNos.Contains(deviceTask.DeviceUniqueNo))
              .OrderBy(deviceTask => deviceTask.CreateTime)
              .Select((deviceTask, deivce, deivceTamplate, ga, galeave, department) => new