diff --git a/yuthon_hr_employee/models/inherit_res_groups.py b/yuthon_hr_employee/models/inherit_res_groups.py
index 589927d2d..a377f73f8 100644
--- a/yuthon_hr_employee/models/inherit_res_groups.py
+++ b/yuthon_hr_employee/models/inherit_res_groups.py
@@ -46,7 +46,9 @@ class ResGroups(models.Model):
             if not department:
                 return valid_user_ids
 
-            dept_id = department.id if isinstance(department, models.Model) else int(department)
+            # 处理虚拟记录（onchange时可能出现）
+            dept_id = department.id.origin if hasattr(department.id, 'origin') else department.id
+            dept_id = int(dept_id) if isinstance(dept_id, str) else dept_id
 
             # 当前部门员工
             employees = self.env['hr.employee'].search([('department_id', '=', dept_id)])