diff --git a/YLErpDAL/Modules/TradeModule/DocGenerateModule/SwapSettlementBillRowBuilder.cs b/YLErpDAL/Modules/TradeModule/DocGenerateModule/SwapSettlementBillRowBuilder.cs
index 36fe722e..d6063274 100644
--- a/YLErpDAL/Modules/TradeModule/DocGenerateModule/SwapSettlementBillRowBuilder.cs
+++ b/YLErpDAL/Modules/TradeModule/DocGenerateModule/SwapSettlementBillRowBuilder.cs
@@ -64,7 +64,6 @@ public static class SwapSettlementBillRowBuilder
         var positions = input.Positions ?? Array.Empty<swap_position>();
         var eventFlows = input.EventFlows ?? Array.Empty<swap_flow_event>();
 
-        // 三个业务日期是结算单和文件命名的必填项，缺失时直接阻止生成不完整附件。
         var startDate = input.Trade.StartDate
             ?? throw new ServiceException("结算单缺少交易起始日");
         var eventDate = input.CloseFlow.UnwindDate
@@ -72,7 +71,7 @@ public static class SwapSettlementBillRowBuilder
         var payDate = input.CloseFlow.PayDate
             ?? throw new ServiceException("结算单缺少支付日");
 
-        // 将同一事件的普通利息与预付金利息分开；预付金本金仅统计结算日前已生效的腿。
+ 
         var settlementPosition = positions.FirstOrDefault(x => x.id == input.CloseFlow.PositionId);
         var interestEvents = eventFlows
             .Where(x => ConsTrade.InterestModels.Contains(x.InterestMode))
@@ -91,9 +90,13 @@ public static class SwapSettlementBillRowBuilder
         var fee = -(input.CloseFlow.TradingFee + input.CloseFlow.TradingFeePending);
         var marginInterest = -marginEvents.Sum(x => x.InterestClosePnL);
         var initialMargin = SumMargin(effectiveMargins, InterestModeEnum.初始预付金);
-        var additionalMargin = SumMargin(effectiveMargins, InterestModeEnum.追加预付金);
+      
+        var additionalMarginPositions = positions
+            .Where(x => x.InterestMode == (int)InterestModeEnum.追加预付金)
+            .ToList();
+        var additionalMargin = SumMargin(additionalMarginPositions, InterestModeEnum.追加预付金);
+
 
-        // 净额结算仅包含全部事件利息和浮动盈亏，不包含预付金返还本金。
         var netSettlementAmount = -eventFlows.Sum(x => x.InterestClosePnL)
             - input.CloseFlow.FloatPnlSum;
         var maturitySettlementAmount = netSettlementAmount + initialMargin + additionalMargin;
@@ -101,10 +104,10 @@ public static class SwapSettlementBillRowBuilder
             ? 0m
             : interestAmount / input.CloseNotionalValue;
 
-        // 日终持仓的当日浮动端分红按标的类型拆分：债券展示期间付息，非债券展示期间分红。
+       
         var isCashBond = ConsGlobal.InstrumentType.IsBond(input.UnderlyingInstrumentType);
 
-        // 此处集中完成模板字段映射和展示精度处理，生成器只负责组装原始业务数据。
+
         return new ExcelReportModel
         {
             TradeNumber = input.ConfirmNo,
@@ -141,7 +144,9 @@ public static class SwapSettlementBillRowBuilder
                 .ToString("0.0000%"),
             MarginInterestAmount = marginInterest.ToString("0.00"),
             InitialMargin = initialMargin.ToString("0.00"),
-            AdditionalMargin = additionalMargin.ToString("0.00"),
+            AdditionalMargin = additionalMarginPositions.Count > 0
+                ? additionalMargin.ToString("0.00")
+                : string.Empty,
             MarginAmout = Math.Abs(initialMargin).ToString("0.00"),
             MarkClosePnl = (-input.CloseFlow.FloatPnlSum).ToString("0.00"),
             NetSettleAmout = netSettlementAmount.ToString("0.00"),