diff --git a/yuthon_report/models/penalty_arrears_report.py b/yuthon_report/models/penalty_arrears_report.py
index 069f0e981..ceac61d0a 100644
--- a/yuthon_report/models/penalty_arrears_report.py
+++ b/yuthon_report/models/penalty_arrears_report.py
@@ -61,12 +61,14 @@ class PenaltyArrearsReport(models.Model):
         total_penalty = total_collected = total_uncollected = 0.0
 
         for idx, rec in enumerate(receivables, start=1):
-            per_day = rec.per_day or 0.0
+            # 获取每天违约金（从difference_amount字段）
+            per_day = rec.difference_amount or rec.per_day or 0.0
             penalty_amount = rec.penalty or 0.0
             penalty_days = round(penalty_amount / per_day, 2) if per_day else 0.0
 
             amount = rec.original_amount or 0.0
-            rent_owed = rec.rent_owed or 0.0
+            # 计算欠租金额（从original_amount字段）
+            rent_owed = rec.original_amount or rec.rent_owed or 0.0
             collected = rec.delivered1 or 0.0
             uncollected = rec.submitted or 0.0
 
@@ -76,10 +78,36 @@ class PenaltyArrearsReport(models.Model):
 
             # 计算违约计算时间区间
             billing_period = ""
-            if rec.due_date and rec.due_date_end:
-                billing_period = f"{rec.due_date.strftime('%Y-%m-%d')} ~ {rec.due_date_end.strftime('%Y-%m-%d')}"
-            elif rec.due_date:
-                billing_period = rec.due_date.strftime("%Y-%m-%d")
+            if rec.due_date:
+                start_date = rec.due_date
+                # 确定结束日期
+                if rec.payout_date:
+                    # 已缴费，结束日期为缴费日期
+                    end_date = rec.payout_date
+                else:
+                    # 未缴费，结束日期为查询月的最后一天
+                    if date_end:
+                        end_date_obj = datetime.datetime.fromisoformat(date_end).date()
+                        # 获取查询月的最后一天
+                        if end_date_obj.month == 12:
+                            last_day = datetime.date(end_date_obj.year, 12, 31)
+                        else:
+                            last_day = datetime.date(end_date_obj.year, end_date_obj.month + 1, 1) - datetime.timedelta(days=1)
+                        end_date = last_day
+                    else:
+                        # 无查询日期，使用当前月最后一天
+                        today = datetime.date.today()
+                        if today.month == 12:
+                            last_day = datetime.date(today.year, 12, 31)
+                        else:
+                            last_day = datetime.date(today.year, today.month + 1, 1) - datetime.timedelta(days=1)
+                        end_date = last_day
+                
+                # 计算违约天数
+                days_diff = (end_date - start_date).days + 1  # 包含开始和结束日期
+                
+                # 构建时间区间字符串
+                billing_period = f"{days_diff} {start_date.strftime('%Y-%m-%d')} ~ {end_date.strftime('%Y-%m-%d')}"
 
             rows.append({
                 "序号": idx,