diff --git a/embed_templates/embed_boot_scripts.html b/embed_templates/embed_boot_scripts.html
index ead5c0d..f2251f0 100644
--- a/embed_templates/embed_boot_scripts.html
+++ b/embed_templates/embed_boot_scripts.html
@@ -889,6 +889,10 @@ function cancelExchangeTpsl(orderId, role){
 
 function allowManualOrderSubmit(form){
     form.dataset.rrOk = "1";
+    if(document.body && document.body.getAttribute("data-embed-shell") === "1" && window.InstanceEmbed && window.InstanceEmbed.postFormAndReload){
+        window.InstanceEmbed.postFormAndReload(form, "开仓提交中…");
+        return;
+    }
     if(window.FormSubmitGuard){
         if(FormSubmitGuard.isLocked(form)){
             FormSubmitGuard.setSubmitLabel(form, "开仓提交中…");
diff --git a/embed_templates/embed_shell.html b/embed_templates/embed_shell.html
index 0977200..da7204d 100644
--- a/embed_templates/embed_shell.html
+++ b/embed_templates/embed_shell.html
@@ -115,6 +115,6 @@
 <script src="/static/manual_order_rr_preview.js?v=3"></script>
 <script src="/static/key_monitor_form.js?v=1"></script>
 {% include 'embed_boot_scripts.html' %}
-<script src="/static/instance_embed.js?v=3"></script>
+<script src="/static/instance_embed.js?v=4"></script>
 </body>
 </html>
diff --git a/static/instance_embed.js b/static/instance_embed.js
index c490072..623ed9a 100644
--- a/static/instance_embed.js
+++ b/static/instance_embed.js
@@ -14,6 +14,9 @@
   let navToken = 0;
   let loadingTab = false;
 
+  /** 自带校验后 form.submit() 的表单，勿在捕获阶段再 fetch 一份（会双发 POST） */
+  const CUSTOM_SUBMIT_FORM_IDS = new Set(["add-order-form", "key-form"]);
+
   function isEmbedShell() {
     return document.body && document.body.getAttribute("data-embed-shell") === "1";
   }
@@ -124,6 +127,26 @@
     return loadTab(getTab(), { replace: true, skipUrl: true });
   }
 
+  function postFormAndReload(form, label) {
+    if (!form) return Promise.resolve();
+    if (global.FormSubmitGuard) {
+      if (global.FormSubmitGuard.isLocked(form)) {
+        global.FormSubmitGuard.setSubmitLabel(form, label || "提交中…");
+      } else {
+        global.FormSubmitGuard.lock(form, label || "提交中…");
+      }
+    }
+    const fd = new FormData(form);
+    return fetch(form.action, {
+      method: form.method || "POST",
+      body: fd,
+      credentials: "same-origin",
+      redirect: "manual",
+    })
+      .then(() => reloadCurrentTab())
+      .catch(() => reloadCurrentTab());
+  }
+
   function patchApplyListWindow() {
     if (typeof global.applyListWindow !== "function") return;
     global.applyListWindow = function embedApplyListWindow() {
@@ -176,6 +199,7 @@
         const form = ev.target;
         if (!(form instanceof HTMLFormElement)) return;
         if (form.method && form.method.toUpperCase() === "GET") return;
+        if (CUSTOM_SUBMIT_FORM_IDS.has(form.id)) return;
         ev.preventDefault();
         const fd = new FormData(form);
         fetch(form.action, {
@@ -221,6 +245,7 @@
     loadTab,
     reloadCurrentTab,
     getTab,
+    postFormAndReload,
   };
 
   if (document.readyState === "loading") {
diff --git a/static/key_monitor_form.js b/static/key_monitor_form.js
index 9edcb50..572d94e 100644
--- a/static/key_monitor_form.js
+++ b/static/key_monitor_form.js
@@ -74,6 +74,20 @@
     });
   }
 
+  function submitKeyForm(keyForm, label) {
+    if (
+      document.body &&
+      document.body.getAttribute("data-embed-shell") === "1" &&
+      global.InstanceEmbed &&
+      typeof global.InstanceEmbed.postFormAndReload === "function"
+    ) {
+      global.InstanceEmbed.postFormAndReload(keyForm, label || "提交中…");
+      return;
+    }
+    if (global.FormSubmitGuard) global.FormSubmitGuard.nativeSubmitOnce(keyForm, label || "提交中…");
+    else keyForm.submit();
+  }
+
   function bindKeyMonitorForm() {
     const keyForm = document.getElementById("key-form");
     const keyTypeSel = document.querySelector('#key-form [name="type"]');
@@ -103,8 +117,7 @@
       }
       const typeVal = (keyForm.querySelector('[name="type"]') || {}).value || "";
       if (typeVal === "假突破") {
-        if (global.FormSubmitGuard) global.FormSubmitGuard.nativeSubmitOnce(keyForm, "提交中…");
-        else keyForm.submit();
+        submitKeyForm(keyForm, "提交中…");
         return;
       }
       if (global.FormSubmitGuard) global.FormSubmitGuard.lock(keyForm, "校验排名中…");
@@ -125,8 +138,7 @@
             if (global.FormSubmitGuard) global.FormSubmitGuard.unlock(keyForm);
             return;
           }
-          if (global.FormSubmitGuard) global.FormSubmitGuard.nativeSubmitOnce(keyForm, "提交中…");
-          else keyForm.submit();
+          submitKeyForm(keyForm, "提交中…");
         })
         .catch(() => {
           alert("日成交量排名检查失败，请稍后重试");