diff --git a/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs b/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs
index b655867f..d67a5063 100644
--- a/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs
+++ b/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/AssignmentService.cs
@@ -189,7 +189,7 @@ public class AssignmentService : IAssignmentService
                                   {
                                       dto.Info = new UserToDeviceResponse
                                       {
-                                          UserId = item.UserId,
+                                          UserId = item.UserId.Value,
                                           UserNo = item.UserNo,
                                           UserCode = item.UserCode,
                                           UserName = item.UserName,