diff --git a/YLErpDAL/Modules/SwapModule/SwapEodPositionService.cs b/YLErpDAL/Modules/SwapModule/SwapEodPositionService.cs
index 230f99d3..e54156b8 100644
--- a/YLErpDAL/Modules/SwapModule/SwapEodPositionService.cs
+++ b/YLErpDAL/Modules/SwapModule/SwapEodPositionService.cs
@@ -58,6 +58,27 @@ namespace YLErp.Modules.SwapModule
             return new EodCurrencyRateService(UserInfo).GetCurrencyRate(quoteCurrency, settlementCurrency, valueDate, seekPreday, currencyRateType);
         }
 
+        /// <summary>
+        /// 计算利息腿利息明细（生产: new SwapDealService(this).GetInterests；测试: 用StubSwapDealService内存算）
+        /// 参数与 SwapDealService.GetInterests 完全一致，保证行为不变。
+        /// </summary>
+        protected virtual List<swap_flow_event> CalcSwapInterests(
+            trade td, trade_extend tradeExtend,
+            DateTime valueDate, DateTime unwindDate,
+            List<eod_swap_position> eodPositions, List<swap_position> positions,
+            decimal posiNotionalValue, decimal posiLongNotionalValue, decimal posiShortNotionalValue,
+            decimal closePosiNotionalValue, decimal closePrecent,
+            int eventType, bool tdClose, bool needPrice,
+            decimal grossPrice, decimal orginPv,
+            bool add = false, bool settment = true, bool newCalcLast = false,
+            List<swap_flow_event> closeList = null)
+        {
+            return new SwapDealService(this).GetInterests(td, tradeExtend, valueDate, unwindDate,
+                eodPositions, positions, posiNotionalValue, posiLongNotionalValue, posiShortNotionalValue,
+                closePosiNotionalValue, closePrecent, eventType, tdClose, needPrice,
+                grossPrice, orginPv, add, settment, newCalcLast, closeList);
+        }
+
         #endregion
 
         /// <summary>
@@ -966,7 +987,7 @@ namespace YLErp.Modules.SwapModule
             {
                 orginPv = eodPayPosition.InterestPrincipalFix;
             }
-            var interests = new SwapDealService(this).GetInterests(td, td.trade_extend, valueDate, valueDate, preEodPositions, positions, posiNotionalValue, posiLongNotional, posiShortNational, posiNotionalValue, closePercent, (int)SwapEventTypeEnum.自动互换, false, true, grossPrice, orginPv, true);
+            var interests = CalcSwapInterests(td, td.trade_extend, valueDate, valueDate, preEodPositions, positions, posiNotionalValue, posiLongNotional, posiShortNational, posiNotionalValue, closePercent, (int)SwapEventTypeEnum.自动互换, false, true, grossPrice, orginPv, true);
             decimal InterestAmount = interests.Sum(x => x.InterestAmount);
             decimal TdInterestAmount = interests.Sum(x => x.TdInterestAmount);
 
@@ -1076,7 +1097,7 @@ namespace YLErp.Modules.SwapModule
             positions.Add(position);
             List<eod_swap_position> preEodPositions = new List<eod_swap_position>();
             preEodPositions.Add(eodPayPosition);
-            var interests = new SwapDealService(this).GetInterests(td, td.trade_extend, valueDate, valueDate, preEodPositions, positions, posiNotionalValue, posiLongNotional, posiShortNational, closeNational, 1, eventType, false, true, grossPrice, orginPv, true, settment: false, newCalcLast: true);
+            var interests = CalcSwapInterests(td, td.trade_extend, valueDate, valueDate, preEodPositions, positions, posiNotionalValue, posiLongNotional, posiShortNational, closeNational, 1, eventType, false, true, grossPrice, orginPv, true, settment: false, newCalcLast: true);
             decimal TdInterestAmount = interests.Sum(x => x.TdInterestAmount);
             decimal InterestAmount = interests.Sum(x => x.InterestAmount);
             newEodPayPosition.ValueDate = valueDate;
@@ -1234,7 +1255,7 @@ namespace YLErp.Modules.SwapModule
             {
                 preEodPositions.Add(eodPayPosition);
             }
-            var interests = new SwapDealService(this).GetInterests(td, td.trade_extend, valueDate, valueDate, preEodPositions, positions, posiNotionalValue, posiLongNational, posiShortNational, posiNotionalValue, closePercent, 0, false, needPrice, grossPrice, orginPv);
+            var interests = CalcSwapInterests(td, td.trade_extend, valueDate, valueDate, preEodPositions, positions, posiNotionalValue, posiLongNational, posiShortNational, posiNotionalValue, closePercent, 0, false, needPrice, grossPrice, orginPv);
             UpdateDbOption(newEodPayPosition);
 
             newEodPayPosition.PosiStatus = 0;