diff --git a/web/src/pages/app/modules/models.ts b/web/src/pages/app/modules/models.ts
index 90b944e..932ddd5 100644
--- a/web/src/pages/app/modules/models.ts
+++ b/web/src/pages/app/modules/models.ts
@@ -35,6 +35,7 @@ type SceneModelMessagePayload = {
 
 type SceneModelMessage = {
   type?: string;
+  requestId?: string;
   payload?: SceneModelMessagePayload;
   message?: string;
 };
@@ -42,6 +43,8 @@ type SceneModelMessage = {
 let dictionariesLoaded = false;
 let dictionariesLoading: Promise<void> | null = null;
 let sceneModelBridgeBound = false;
+let pendingSceneModelRequestId = "";
+let pendingSceneModelRequestTimer: number | null = null;
 
 export function bindModelActions() {
   const isAdmin = getCurrentUser()?.role === "admin";
@@ -305,13 +308,26 @@ function requestSceneModelImport() {
     notify("请在 DMT 主程序中使用导入场景模型");
     return;
   }
+  const requestId = createSceneModelRequestId();
+  pendingSceneModelRequestId = requestId;
+  clearSceneModelRequestTimer();
+  pendingSceneModelRequestTimer = window.setTimeout(() => {
+    if (pendingSceneModelRequestId !== requestId) return;
+    pendingSceneModelRequestId = "";
+    pendingSceneModelRequestTimer = null;
+    notifyError("主程序未响应导入场景模型请求，请确认模型库是在主程序面板中打开");
+  }, 15000);
   window.parent.postMessage({
-    type: requestSceneModelMessageType
+    type: requestSceneModelMessageType,
+    requestId
   }, resolveParentOrigin());
   notify("已请求主程序导出当前选中模型");
 }
 
 async function handleSceneModelMessage(data: SceneModelMessage) {
+  if (pendingSceneModelRequestId && data.requestId && data.requestId !== pendingSceneModelRequestId) return;
+  pendingSceneModelRequestId = "";
+  clearSceneModelRequestTimer();
   if (data.type === sceneModelErrorMessageType) {
     notifyError(data.message || "主程序导出模型失败");
     return;
@@ -332,6 +348,16 @@ async function handleSceneModelMessage(data: SceneModelMessage) {
   });
 }
 
+function clearSceneModelRequestTimer() {
+  if (pendingSceneModelRequestTimer === null) return;
+  window.clearTimeout(pendingSceneModelRequestTimer);
+  pendingSceneModelRequestTimer = null;
+}
+
+function createSceneModelRequestId() {
+  return `scene-model-${Date.now()}-${Math.random().toString(36).slice(2)}`;
+}
+
 function isAllowedParentOrigin(origin: string) {
   const expectedOrigin = resolveParentOrigin();
   return expectedOrigin === "*" || origin === expectedOrigin;