diff --git a/yuthon_hr_attendance/models/overtime_approval.py b/yuthon_hr_attendance/models/overtime_approval.py
index 6da57e0ba..154e2f170 100644
--- a/yuthon_hr_attendance/models/overtime_approval.py
+++ b/yuthon_hr_attendance/models/overtime_approval.py
@@ -259,10 +259,10 @@ class OvertimeApprovals(models.Model):
                 if actual_start < base_start:
                     total_overtime_seconds += (base_start - actual_start).total_seconds()
                 if actual_end > base_end:
-                    total_overtime_seconds += (actual_end - base_end).total_seconds()
+                    real_overtime_start = max(base_end, actual_start)
+                    total_overtime_seconds += (actual_end - real_overtime_start).total_seconds()
             else:
                 total_overtime_seconds = (actual_end - actual_start).total_seconds()
-
             original_hours = total_overtime_seconds / 3600
             # 加班起步一小时
             if original_hours < 1.0: