diff --git a/yuthon_hr_attendance/models/overtime_approval.py b/yuthon_hr_attendance/models/overtime_approval.py
index 94beebc68..c51f7b59a 100644
--- a/yuthon_hr_attendance/models/overtime_approval.py
+++ b/yuthon_hr_attendance/models/overtime_approval.py
@@ -167,13 +167,13 @@ class OvertimeApprovals(models.Model):
                 corrected_end_time = max_allowed_end_time - timedelta(hours=8)
                 rec.end_time = corrected_end_time
 
-    @api.depends('users_id', 'duration')
+    @api.depends('users_id', 'duration', 'start_time')
     def _compute_overtime_hours(self):
         for rec in self:
             rec.overtime_hours = 0.0
-            if not rec.users_id:
+            if not rec.users_id or not rec.start_time:
                 continue
-            now = datetime.now()  # 获取当前时间（datetime类型）
+            now = rec.start_time # 获取当前时间（datetime类型）
             first_datetime = datetime(now.year, now.month, 1, 0, 0, 0)
             if now.month == 12:
                 next_month_datetime = datetime(now.year + 1, 1, 1, 0, 0, 0)