diff --git a/yuthon_hr_attendance/models/yuthon_vacation_reports.py b/yuthon_hr_attendance/models/yuthon_vacation_reports.py
index 39152fa44..dfe849d66 100644
--- a/yuthon_hr_attendance/models/yuthon_vacation_reports.py
+++ b/yuthon_hr_attendance/models/yuthon_vacation_reports.py
@@ -637,7 +637,10 @@ class YuthonVacationReports(models.Model):
                 month_start = date(year, month, 1)
                 month_end = date(year, month, calendar.monthrange(year, month)[1])
                 # 计算start_date：外派且无合同时用month_start，否则取合同开始日与month_start的最大值
-                start_date = month_start if (is_outside and not contract) else max(contract.date_start, month_start)
+                if contract.date_start:
+                    start_date = month_start if (is_outside and not contract) else max(contract.date_start, month_start)
+                else:
+                    start_date = month_start
                 # 计算end_date：外派且无合同时用month_end；有合同且有结束日则取最小值；其他情况用month_end
                 end_date = month_end if (is_outside and not contract) else (min(contract.date_end, month_end) if contract.date_end else month_end)
                 leave_days, statutory_days = rec._create_leave_record(rec.employee_id, start_date, end_date)