diff --git a/Src/Dlhis.ScheduledTask/TaskAssignment/Job/CreateSyncServerDateTimeJob.cs b/Src/Dlhis.ScheduledTask/TaskAssignment/Job/CreateSyncServerDateTimeJob.cs
index 44a2618c..3729ea1b 100644
--- a/Src/Dlhis.ScheduledTask/TaskAssignment/Job/CreateSyncServerDateTimeJob.cs
+++ b/Src/Dlhis.ScheduledTask/TaskAssignment/Job/CreateSyncServerDateTimeJob.cs
@@ -22,10 +22,18 @@ namespace Dlhis.ScheduledTask.TaskAssignment.Job
             _dbContext.Client.QueryFilter.ClearAndBackup();
             try
             {
-                var devices = await _dbContext.Queryable<DeviceEntity>().Where(x => x.Enable).ToListAsync();
+                var deviceUniqueNos = await _dbContext.Queryable<DeviceTaskEntity>().Where(x => x.Status == DeviceTaskStatusEnumType.Wait)
+                       .Where(x => x.Type == DeviceTaskEnumType.SyncDateTime)
+                       .Select(x => x.DeviceUniqueNo)
+                       .ToListAsync();
+
+                var devices = await _dbContext.Queryable<DeviceEntity>()
+                    .Where(x => deviceUniqueNos.Contains(x.UniqueNo))
+                    .Where(x => x.Enable)
+                    .ToListAsync();
+
                 var tasks = devices.Select(x => new DeviceTaskEntity
                 {
-
                     DeviceUniqueNo = x.UniqueNo,
                     Status = DeviceTaskStatusEnumType.Wait,