diff --git a/YLErpDAL/Modules/UnderlyingModule/UnderlyingHelper.cs b/YLErpDAL/Modules/UnderlyingModule/UnderlyingHelper.cs
index be030982..52c55e39 100644
--- a/YLErpDAL/Modules/UnderlyingModule/UnderlyingHelper.cs
+++ b/YLErpDAL/Modules/UnderlyingModule/UnderlyingHelper.cs
@@ -194,6 +194,27 @@ namespace YLErp.Modules.UnderlyingModule
             }
         }
 
+        /// <summary>
+        /// 清除指定标的的保证金率缓存
+        /// </summary>
+        /// <param name="underlyingCode">标的代码，为空时清除全部</param>
+        public static void ClearMarginRateCache(string underlyingCode = null)
+        {
+            try
+            {
+                if (ylCache == null) return;
+
+                var cachePattern = string.IsNullOrEmpty(underlyingCode)
+                    ? "ClientMarginRate:*"
+                    : $"ClientMarginRate:*:{underlyingCode}:*";
+                ylCache.BatchDelete(cachePattern);
+            }
+            catch (Exception ex)
+            {
+                LogFactory.GetLogger("UnderlyingHelper").Error($"清除保证金率缓存时发生异常: {ex.Message}", ex);
+            }
+        }
+
         /// <summary>
         /// 获取篮子标的品种对象
         /// </summary>
diff --git a/YLErpWeb/Controllers/underlying_managerController.cs b/YLErpWeb/Controllers/underlying_managerController.cs
index 3c3585bc..85e08a03 100644
--- a/YLErpWeb/Controllers/underlying_managerController.cs
+++ b/YLErpWeb/Controllers/underlying_managerController.cs
@@ -477,6 +477,7 @@ namespace YLErp.Web.Controllers
                 model.ExJson = JsonHelper.Serialize(model.Bond);
             }
             var r = new UnderlyingDalService(CurUser).SaveUnderlyingData(model);
+            YLErp.Modules.UnderlyingModule.UnderlyingHelper.ClearMarginRateCache(model.UnderlyingCode);
             return JsonSuccess("更新成功", r);
         }