diff --git a/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/DeviceTaskAssignmentService.cs b/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/DeviceTaskAssignmentService.cs
index b0193071..c5674450 100644
--- a/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/DeviceTaskAssignmentService.cs
+++ b/Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/DeviceTaskAssignmentService.cs
@@ -47,7 +47,7 @@ public class DeviceTaskAssignmentService : IDeviceTaskAssignmentService
             .WhereIF(request.IsOffline.HasValue && request.IsOffline.Value, (deviceTask, device, ga, gaLeave, gaEx, deviceRegistry) =>
                 SqlFunc.DateAdd(deviceRegistry.LastHeartbeatTime, device.HeartbeatInterval, DateType.Second) < DateTime.Now)
             .WhereIF(request.IsOffline.HasValue && !request.IsOffline.Value, (deviceTask, device, ga, gaLeave, gaEx, deviceRegistry) =>
-                SqlFunc.DateAdd(deviceRegistry.LastHeartbeatTime, device.HeartbeatInterval, DateType.Second) >= DateTime.Now)
+                device.HeartbeatInterval == 0 || SqlFunc.DateAdd(deviceRegistry.LastHeartbeatTime, device.HeartbeatInterval, DateType.Second) >= DateTime.Now)
             .OrderBy(deviceTask => deviceTask.CreateTime, OrderByType.Desc)
             .Select((deviceTask, device, ga, gaLeave, gaEx, deviceRegistry) => new DeviceTaskAssignmentResponse
             {