diff --git a/YLErpDAL/Modules/SwapModule/SwapDealService.cs b/YLErpDAL/Modules/SwapModule/SwapDealService.cs
index 7bd8621d..b9145466 100644
--- a/YLErpDAL/Modules/SwapModule/SwapDealService.cs
+++ b/YLErpDAL/Modules/SwapModule/SwapDealService.cs
@@ -497,6 +497,48 @@ namespace YLErp.Modules.SwapModule
 
         #endregion
 
+        /// <summary>
+        /// 根据指定日期刷新浮动腿基线（处理公司行为除权）
+        /// 用于前端修改平仓日期后重新获取除权后的持仓数量和价格
+        /// </summary>
+        /// <param name="tradeId">交易ID</param>
+        /// <param name="valueDate">平仓日期</param>
+        /// <returns>返回浮动腿的最新基线数据</returns>
+        public virtual (decimal PositionQty, decimal PosiNotionalValue, decimal PosiGrossPrice, decimal PosiNetPrice, bool IsRestored) RefreshFloatLegBaseline(int tradeId, DateTime valueDate)
+        {
+            var td = DbContext.trade.Find(tradeId);
+            if (td == null)
+            {
+                throw new ServiceException("未找到交易信息");
+            }
+
+            var positions = DbContext.swap_position.ActiveByTrade(tradeId);
+            var position = positions.Where(x => !string.IsNullOrEmpty(x.UnderlyingCode) && !x.IsInitial).FirstOrDefault();
+
+            if (position == null)
+            {
+                // 无浮动腿，返回trade表的原始值
+                return (
+                    Convert.ToDecimal(td.TradeAmount),
+                    Convert.ToDecimal(td.StockEqvNotional),
+                    0m,
+                    0m,
+                    false
+                );
+            }
+
+            // 尝试恢复除权后的 EOD 基线
+            var restoredCorporateActionBaseline = TryRestorePositionFromEod(position, valueDate);
+
+            return (
+                position.PosiQuantity,
+                position.PosiNotionalValue,
+                position.PosiGrossPrice,
+                position.PosiNetPrice,
+                restoredCorporateActionBaseline
+            );
+        }
+
         /// <summary>
         /// 平仓初始化
         /// </summary>
diff --git a/YLErpWeb/Controllers/SwapTrade2Controller.cs b/YLErpWeb/Controllers/SwapTrade2Controller.cs
index 33c82881..421b5cc3 100644
--- a/YLErpWeb/Controllers/SwapTrade2Controller.cs
+++ b/YLErpWeb/Controllers/SwapTrade2Controller.cs
@@ -393,6 +393,32 @@ namespace YLErp.Web.Controllers
             new SwapTradeService(CurUser).TradeBack(model.TradeId, model.TradeDate);
             return JsonSuccess("回退成功");
         }
+        /// <summary>
+        /// 根据平仓日期刷新持仓基线（处理公司行为除权）
+        /// </summary>
+        /// <param name="tradeId">交易ID</param>
+        /// <param name="valueDate">事件日期/平仓日期</param>
+        /// <returns>返回最新的持仓数量、价格等基线数据</returns>
+        public JsonResult RefreshUnwindBaseline(int tradeId, DateTime valueDate)
+        {
+            var (positionQty, posiNotionalValue, posiGrossPrice, posiNetPrice, isRestored) =
+                new SwapDealService(CurUser).RefreshFloatLegBaseline(tradeId, valueDate);
+
+            var result = new
+            {
+                PositionQty = positionQty,
+                PosiNotionalValue = posiNotionalValue,
+                PosiGrossPrice = posiGrossPrice,
+                PosiNetPrice = posiNetPrice,
+                IsRestored = isRestored,
+                // 全平时，平仓数量等于持仓数量
+                CloseQty = positionQty,
+                CloseNotionalValue = posiNotionalValue
+            };
+
+            return JsonSuccess("", result);
+        }
+
         /// <summary>
         /// 平仓利息腿信息
         /// </summary>
diff --git a/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js b/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js
index 1f70d833..ab2e3c05 100644
--- a/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js
+++ b/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js
@@ -175,6 +175,8 @@ const vue = new Vue({
                 this.floatPosition.UnwindDate = e;
             }
             if (!isUseApproval) {
+                // 新增：刷新持仓基线（处理公司行为除权）
+                this.refreshUnwindBaseline();
                 this.getInterestList();
                 //this.refreshUnderlyingPrice();
             } else {
@@ -365,6 +367,57 @@ const vue = new Vue({
             thisObj.deal.SwapMarginRebatePnl = formatSwapAmount(thisObj.deal.SwapMarginRebatePnl);
             thisObj.deal.SwapMarginAmount = formatSwapAmount(thisObj.deal.SwapMarginAmount);
         },
+        refreshUnwindBaseline() {//刷新持仓基线（处理公司行为除权）
+            var thisObj = this;
+            var postData = {
+                tradeId: thisObj.deal.SwapTradeId,
+                valueDate: thisObj.deal.ValueDate
+            };
+            main.post("/swaptrade2/RefreshUnwindBaseline", postData, { async: true }).done(function (resp) {
+                if (resp.success) {
+                    var data = resp.obj;
+                    // 更新持仓数量和名义本金
+                    thisObj.deal.PositionQty = data.PositionQty;
+                    thisObj.deal.PositionQty2 = data.PositionQty;  // 新增：同时更新 PositionQty2（界面显示用）
+                    thisObj.deal.PosiNotionalValue = data.PosiNotionalValue;
+
+                    // 如果是全平，更新平仓数量和名义本金
+                    if (thisObj.deal.CloseMethod == 1) {  // 全部平仓
+                        thisObj.deal.CloseQty = data.CloseQty;
+                        thisObj.deal.CloseNotionalValue = data.CloseNotionalValue;
+                    }
+
+                    // 更新浮动腿的期初价格和数量
+                    if (thisObj.floatPosition) {
+                        thisObj.floatPosition.PosiGrossPrice = data.PosiGrossPrice;
+                        thisObj.floatPosition.PosiNetPrice = data.PosiNetPrice;
+                        thisObj.initPosiNetPrice = data.PosiGrossPrice;
+                        // 更新浮动腿的持仓数量（底部表格显示用）
+                        thisObj.floatPosition.PositionQty = data.PositionQty;
+                    }
+
+                    // 重新计算最多可平比例
+                    thisObj.oriClosePercent = (thisObj.deal.NotionalValue && thisObj.deal.PosiNotionalValue)
+                        ? thisObj.deal.PosiNotionalValue / thisObj.deal.NotionalValue : 1;
+
+                    // 如果是全平，更新平仓比例
+                    if (thisObj.deal.CloseMethod == 1) {
+                        thisObj.deal.ClosePercent = thisObj.oriClosePercent;
+                    }
+
+                    // 强制 Vue 更新界面
+                    thisObj.$forceUpdate();
+
+                    // 可选：显示提示信息
+                    if (data.IsRestored && window.otcDebug) {
+                        console.log('[公司行为] 已根据除权后的EOD基线刷新持仓数据', {
+                            PositionQty: data.PositionQty,
+                            PosiGrossPrice: data.PosiGrossPrice
+                        });
+                    }
+                }
+            });
+        },
         getInterestList() {//根据平仓日期获取利息腿信息
             var thisObj = this;
             // closePercent 按"占期初(original)"语义(A)传给后端，由 GetUnwindInterestList 转为"占剩余(B)"计算