diff --git a/UnitTestProject/Modules/SwapModule/ClosePercentProductContractTest.cs b/UnitTestProject/Modules/SwapModule/ClosePercentProductContractTest.cs
index ad44bead..7c3d5722 100644
--- a/UnitTestProject/Modules/SwapModule/ClosePercentProductContractTest.cs
+++ b/UnitTestProject/Modules/SwapModule/ClosePercentProductContractTest.cs
@@ -353,5 +353,33 @@ namespace YLErp.Modules.SwapModule
             Console.WriteLine($"⚠ 退化场景：A={closePercentA} == B={convertedB}（首次平仓，无法暴露双重转换bug）");
             Console.WriteLine($"✅ 非退化场景见 CPC_005/007：A=0.325 ≠ B=0.50（多次部分平仓后才能暴露）");
         }
+
+        [TestMethod]
+        public void CPC_011_日期刷新基线后_部分平仓数量必须按原比例重算()
+        {
+            var directory = new DirectoryInfo(AppContext.BaseDirectory);
+            string source = null;
+            while (directory != null && source == null)
+            {
+                var path = Path.Combine(directory.FullName, "YLErpWeb", "wwwroot", "Scripts", "app", "swaptrade", "unwindSwapTrade.js");
+                if (File.Exists(path))
+                {
+                    source = File.ReadAllText(path);
+                }
+                directory = directory.Parent;
+            }
+
+            Assert.IsNotNull(source, "未找到 unwindSwapTrade.js");
+            var refreshStart = source.IndexOf("refreshUnwindBaseline() {//", StringComparison.Ordinal);
+            var refreshEnd = source.IndexOf("getInterestList() {//", refreshStart, StringComparison.Ordinal);
+            var refreshMethod = source.Substring(refreshStart, refreshEnd - refreshStart);
+            var oriClosePercentIndex = refreshMethod.IndexOf("thisObj.oriClosePercent =", StringComparison.Ordinal);
+            var recalcCloseQtyIndex = refreshMethod.IndexOf(
+                "thisObj.deal.CloseQty = thisObj.calcCloseQtyByPercent(thisObj.deal.ClosePercent);",
+                StringComparison.Ordinal);
+
+            Assert.IsTrue(recalcCloseQtyIndex > oriClosePercentIndex,
+                "日期刷新并更新最多可平比例后，部分平仓数量必须按保留的平仓比例重新计算。");
+        }
     }
 }
diff --git a/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js b/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js
index 5b2050ef..52153c5a 100644
--- a/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js
+++ b/YLErpWeb/wwwroot/Scripts/app/swaptrade/unwindSwapTrade.js
@@ -524,6 +524,8 @@ const vue = new Vue({
                     // 如果是全平，更新平仓比例
                     if (thisObj.deal.CloseMethod == 1) {
                         thisObj.deal.ClosePercent = thisObj.oriClosePercent;
+                    } else {
+                        thisObj.deal.CloseQty = thisObj.calcCloseQtyByPercent(thisObj.deal.ClosePercent);
                     }
 
                     // 强制 Vue 更新界面