diff --git a/YLErpDAL/Modules/SwapModule/SwapEndConfirmService.cs b/YLErpDAL/Modules/SwapModule/SwapEndConfirmService.cs
index 05c0ec86..0517f9c3 100644
--- a/YLErpDAL/Modules/SwapModule/SwapEndConfirmService.cs
+++ b/YLErpDAL/Modules/SwapModule/SwapEndConfirmService.cs
@@ -256,5 +256,47 @@ namespace YLErp.Modules.SwapModule
             }
             return "未配置邮件接口地址";
         }
+
+        /// <summary>
+        /// EQD-5320 批量发送结算确认书邮件：服务端代理 bond-oms /swap/email/settle/batchSend。
+        /// 前端原直连 /trs_hub_api 反向代理（依赖 nginx 配置，未配的环境 404）——统一改走本代理，
+        /// 与债券计算器/SendEmail 同一条 BondOmsInterface_BaseUrl 出口，不再依赖前端网关。
+        /// 返回 空串=成功；非空=失败原因（透传 bond-oms message）。
+        /// </summary>
+        public string BatchSendSettleEmail(List<long> swapFlowEventIds)
+        {
+            var baseUrl = Environment.GetEnvironmentVariable("BondOmsInterface_BaseUrl");
+            if (string.IsNullOrEmpty(baseUrl))
+            {
+                return "未配置邮件接口地址(BondOmsInterface_BaseUrl)";
+            }
+            const string url = "/swap/email/settle/batchSend";
+            var logger = LogFactory.GetLogger("SwapEndConfirm");
+            var idsDesc = string.Join(",", swapFlowEventIds);
+            try
+            {
+                var result = new HttpHelper(baseUrl, null)
+                    .PostRequestNoAuth<OmsSettleBatchSendReq, SendEmailResult>(url,
+                        new OmsSettleBatchSendReq { swapFlowEventIds = swapFlowEventIds })
+                    .Result;
+                logger.Info($"批量发送结算确认书: url={baseUrl}{url} ids=[{idsDesc}] → success={result?.success} message={result?.message}");
+                if (result == null)
+                {
+                    return "邮件服务无响应";
+                }
+                return result.success ? "" : (result.message ?? "发送失败");
+            }
+            catch (Exception ex)
+            {
+                logger.Error($"批量发送结算确认书异常: url={baseUrl}{url} ids=[{idsDesc}]", ex);
+                return "请求邮件服务异常：" + ex.GetBaseException().Message;
+            }
+        }
+
+        /// <summary>bond-oms SettleEmailSendParam 契约（字段名须与 Java 端一致，Jackson 按 swapFlowEventIds 绑定）</summary>
+        private class OmsSettleBatchSendReq
+        {
+            public List<long> swapFlowEventIds { get; set; }
+        }
     }
 }
diff --git a/YLErpWeb/Controllers/SwapTrade2Controller.cs b/YLErpWeb/Controllers/SwapTrade2Controller.cs
index 33c82881..91512f91 100644
--- a/YLErpWeb/Controllers/SwapTrade2Controller.cs
+++ b/YLErpWeb/Controllers/SwapTrade2Controller.cs
@@ -1207,6 +1207,34 @@ namespace YLErp.Web.Controllers
             return JsonSuccess(result);
         }
 
+        /// <summary>
+        /// EQD-5320 批量发送结算确认书邮件——经服务端代理 bond-oms（BondOmsInterface_BaseUrl 出口），
+        /// 替代前端直连 /trs_hub_api 反向代理（未配 nginx 的环境 404）。
+        /// </summary>
+        /// <param name="swapFlowEventIds">平仓流水id，逗号分隔</param>
+        [HttpPost]
+        public JsonResult BatchSendSettleEmail(string swapFlowEventIds)
+        {
+            if (string.IsNullOrWhiteSpace(swapFlowEventIds))
+            {
+                return JsonError("请选择交易");
+            }
+            var ids = new List<long>();
+            foreach (var s in swapFlowEventIds.Split(',', StringSplitOptions.RemoveEmptyEntries))
+            {
+                if (long.TryParse(s.Trim(), out var id))
+                {
+                    ids.Add(id);
+                }
+            }
+            if (ids.Count == 0)
+            {
+                return JsonError("平仓流水id解析为空");
+            }
+            var result = new SwapEndConfirmService(CurUser).BatchSendSettleEmail(ids);
+            return string.IsNullOrEmpty(result) ? JsonSuccess("发送成功") : JsonError(result);
+        }
+
 
     }
 }
diff --git a/YLErpWeb/wwwroot/Scripts/app/swaptrade/tradeEndConfirmList.js b/YLErpWeb/wwwroot/Scripts/app/swaptrade/tradeEndConfirmList.js
index 90eb900d..f6ee26e4 100644
--- a/YLErpWeb/wwwroot/Scripts/app/swaptrade/tradeEndConfirmList.js
+++ b/YLErpWeb/wwwroot/Scripts/app/swaptrade/tradeEndConfirmList.js
@@ -167,29 +167,30 @@ function SendEmailEitherReport() {
         main.message("请选择普通交易");
         return;
     }
-    var url = "/trs_hub_api/swap/email/settle/batchSend";
-    var postData = { swapFlowEventIds: selIds }
+    // EQD-5320: 改走本系统后端代理(/swaptrade2/BatchSendSettleEmail → BondOmsInterface_BaseUrl → bond-oms)，
+    // 与债券计算器同一条服务端出口；原直连 /trs_hub_api 反向代理在未配 nginx 的环境 404
+    var url = "/swaptrade2/BatchSendSettleEmail";
+    var postData = { swapFlowEventIds: selIds.join(',') }
     $.ajax({
         type: "post",
         url: url,
-        data: JSON.stringify(postData),
+        data: postData,
         dataType: "json",
-        contentType:"application/json",
         success: function (res) {
-            // 代理/网关异常时可能返回非标准结构——统一兜底提示，绝不让点击"无反应"
+            // 兜底非标准返回结构，绝不让点击"无反应"
             if (res && res.success) {
-                main.message("发送成功(共" + selIds.length + "笔)，详情见bond-oms日志[结算确认书邮件]");
+                main.message(res.msg || ("发送成功(共" + selIds.length + "笔)"));
                 SearchClick(); // 刷新列表以反映发送状态
             } else {
-                var msg = (res && (res.message || res.msg)) || "发送失败：服务返回异常结构";
+                var msg = (res && (res.msg || res.message)) || "发送失败：服务返回异常结构";
                 main.message(msg);
                 console.error("[批量发送确认书] 业务失败:", res);
             }
         },
         error: function (xhr, textStatus, errThrown) {
-            // 请求层失败：代理不通/超时/返回非JSON(如被登录页重定向)——此前无error回调导致点击"毫无反应"
+            // 请求层失败：超时/返回非JSON(如被登录页重定向)
             var detail = "HTTP " + xhr.status + " " + (textStatus || "") + (errThrown ? " " + errThrown : "");
-            main.message("发送请求失败(" + detail + ")：请检查服务是否可用(含/trs_hub_api代理)，详情见控制台与网络面板");
+            main.message("发送请求失败(" + detail + ")：请检查服务是否可用，详情见控制台与网络面板");
             console.error("[批量发送确认书] 请求失败:", detail, xhr);
         },
         beforeSend(jqXHR) {