diff --git a/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs b/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs
index 2a4e0125..fbf1e68e 100644
--- a/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs
+++ b/Src/Dlhis.Basic/Device/Services/Implements/DevicePermissionService.cs
@@ -583,12 +583,12 @@ public class DevicePermissionService : IDevicePermissionService
 
         var result = new Dictionary<string, List<UserTenantDeviceCodeDto>>(gainfos.Count, StringComparer.OrdinalIgnoreCase);
 
-        foreach (var gainfo in gainfos)
+        Parallel.ForEach(gainfos, gainfo =>
         {
             var codes = GetAssignDeviceCodesInternal(gainfo, gainfoGroupRelationships, devicePermissions, deviceGroups, deviceRelationships, registries, devices);
             result.Add(gainfo.No, codes);
-        }
-
+        });
+        
         return result;
     }