diff --git a/YLErpDAL/Modules/EodModule/SettlementModule/EodCheckMonitoredTrade.cs b/YLErpDAL/Modules/EodModule/SettlementModule/EodCheckMonitoredTrade.cs
index 79a3b431..1e3a79a6 100644
--- a/YLErpDAL/Modules/EodModule/SettlementModule/EodCheckMonitoredTrade.cs
+++ b/YLErpDAL/Modules/EodModule/SettlementModule/EodCheckMonitoredTrade.cs
@@ -176,33 +176,37 @@ namespace YLErp.Modules.EodModule.SettlementModule
 
         }
         /// <summary>
-        /// 计算互换预付金
+        /// 计算互换预付金（保证金模板V2 引擎，本端闭环）。
+        /// 2026-08-26 收口：原实现 HTTP 调 bond-oms /marginAlgorithm/triggerMarginCalc——Java 按 marginrate
+        /// （旧预付金率维护数据）对在市互换算盯市并清写当天 trade_span/client_span；现改为直接跑本端预付金引擎
+        /// EodWorstClientPayableCalc（模板V2 三级层解析：无预付金=0、区间追保结构 x/y 或方案B收盘落档，
+        /// 产出 trade_span.Spv 并聚合 client_span），保证金计算→追加预付金生成闭环全部在 .NET。
+        /// 交易范围与原 Java selectPreCloseTradeList 同口径：在市收益互换（确认成交未到期 + 平仓日落在区间），
+        /// 剔除多空组合子交易（引擎本身跳过）；"日终持仓结算"步骤随后会对确认成交全集幂等重算覆盖。
+        /// Java 侧自此仅保留资金通知书邮件与 DMA 实时预付金（RealtimePnlCalc.CalcDMAMargin，迁移方案阶段三待切项）。
+        /// preSettleDate 参数保留以维持调用签名，引擎取数按 settleDate 自行解析。
         /// </summary>
         /// <returns></returns>
         public bool CalculateMargin(DateTime settleDate, DateTime preSettleDate, IEnumerable<int> ClientIds)
         {
-            // 构建请求对象
-            CalculateMarginRequest request = new CalculateMarginRequest()
+            var clientIds = ClientIds?.Where(x => x > 0).Distinct().ToList();
+            List<trade> tradeList;
+            using (var db = new YLErp.BLL.YLContext())
             {
-                currentDate = settleDate.ToString("yyyy-MM-dd"),
-                clientIds = ClientIds,
-                preSettleDate = preSettleDate.ToString("yyyy-MM-dd")
-            };
-            var baseUrl = Environment.GetEnvironmentVariable("BondOmsInterface_BaseUrl");
-            var calculateMarginUrl = "/marginAlgorithm/triggerMarginCalc";
-
-            if (!string.IsNullOrEmpty(baseUrl))
-            {
-                var httpHelper = new HttpHelper(baseUrl, null);
-                // http 请求 Web项目接口
-                var result = httpHelper.PostRequestNoAuth<CalculateMarginRequest, CalculateMarginResponse>(calculateMarginUrl, request).Result;
-
-                if (result != null && !result.success)
+                var query = db.trade.Where(t => t.TradeType == "收益互换"
+                        && t.ValidState != YLErp.ConsGlobal.InValid
+                        && t.ParentTradeId == 0
+                        && ((t.TradeStatus == YLErp.DBModels.ConsTrade.确认成交 && t.TradeDate <= settleDate && t.ExerciseDate >= settleDate)
+                            || (t.TradeStatus == YLErp.DBModels.ConsTrade.已平仓 && t.TradeDate <= settleDate
+                                && t.UnWindDate > settleDate && t.UnWindDate > t.StartDate)));
+                if (clientIds != null && clientIds.Count > 0)
                 {
-                    throw new ServiceException($"互换预付金计算失败：{result.message}");
+                    var idScope = clientIds;
+                    query = query.Where(t => idScope.Contains(t.ClientId));
                 }
+                tradeList = query.ToList();
             }
-
+            new EodWorstClientPayableCalc(_context).WorstClientPayableCalc(tradeList);
             return true;
         }
     }
diff --git a/YLErpWeb/App_Data/Menus.txt b/YLErpWeb/App_Data/Menus.txt
index e572691f..966c67f1 100644
--- a/YLErpWeb/App_Data/Menus.txt
+++ b/YLErpWeb/App_Data/Menus.txt
@@ -94,7 +94,7 @@
 	{Name:"交易市场",Rights:["基础参数管理-交易市场"],Url:"market/marketList"},
 	{Name:"变更记录",Rights:["基础参数管理-变更记录"],Url:"Datatrace/ClientInfoChange"},
 	{Name:"设置货币",Rights:["基础参数管理-设置货币"],Url:"Currency/setCurrency"},
-	{Name:"预付金模板V2",Rights:["基础参数管理-预付金模板V2"],Url:"margin_template_v2/margin_template_v2List"},
+	{Name:"预付金模板",Rights:["基础参数管理-预付金模板V2"],Url:"margin_template_v2/margin_template_v2List"},
 	]
 },
 {Name:"系统管理",Rights:["系统管理"],Icon:"menu-icon iconten"