diff --git a/components/monitoring/MonitoringTopologyView.tsx b/components/monitoring/MonitoringTopologyView.tsx
index e9373eb..6164d0d 100644
--- a/components/monitoring/MonitoringTopologyView.tsx
+++ b/components/monitoring/MonitoringTopologyView.tsx
@@ -1,4 +1,4 @@
-/**
+/**
  * 运行监控 - 3D 拓扑大屏
  *
  * 移植自 ITYUNWEI TopologyView.vue
@@ -2306,10 +2306,20 @@ export function MonitoringTopologyView({ hosts, keys }: Props) {
           }
         } catch { /* ignore */ }
       }
-      // 本地 Electron：从 localStorage 读
+      // 本地 Electron：从 localStorage 读，找不到则从主进程 inspection-data.json 读
       try {
-        const saved = localStorage.getItem('monitoring-topology-positions');
-        return saved ? JSON.parse(saved) : null;
+        let saved = localStorage.getItem('monitoring-topology-positions');
+        if (saved) return JSON.parse(saved);
+        // portable 版 localStorage 为空 → fallback 主进程 JSON（sendSync 同步）
+        try {
+          const nc = (window as any).netcatty;
+          const fromMain = nc?.inspection?.getTopologyPositionsSync?.();
+          if (fromMain && typeof fromMain === 'object' && Object.keys(fromMain).length > 0) {
+            console.info('[Monitoring] localStorage 无位置，从主进程 inspection-data.json 加载');
+            return fromMain;
+          }
+        } catch { /* ignore */ }
+        return null;
       } catch { return null; }
     })();
 
diff --git a/electron/bridges/inspection/index.cjs b/electron/bridges/inspection/index.cjs
index ac6fb4e..b0d7d3a 100644
--- a/electron/bridges/inspection/index.cjs
+++ b/electron/bridges/inspection/index.cjs
@@ -1544,6 +1544,13 @@ function registerInspectionHandlers(ipcMain, options) {
     } catch { return {}; }
   });
 
+  // sendSync 同步版本 — renderer 3D 布局 fallback 读取用
+  ipcMain.on("inspection:getTopologyPositions", (event) => {
+    try {
+      event.returnValue = readStorage("_topology_positions") || {};
+    } catch { event.returnValue = {}; }
+  });
+
   // 监控大屏标题同步（Electron localStorage → 远程浏览器可读）
   ipcMain.handle("inspection:saveDashboardTitle", (_e, title) => {
     if (!title || typeof title !== "string") return { ok: false };
diff --git a/electron/preload/api.cjs b/electron/preload/api.cjs
index d6762fd..1021957 100644
--- a/electron/preload/api.cjs
+++ b/electron/preload/api.cjs
@@ -2122,6 +2122,10 @@ function createPreloadApi(ctx) {
     // 拓扑位置持久化（供远程浏览器同步读取）
     saveTopologyPositions: (positions) => ipcRenderer.invoke("inspection:saveTopologyPositions", positions),
     getTopologyPositions: () => ipcRenderer.invoke("inspection:getTopologyPositions"),
+    // 同步版本 — renderer 3D 布局同步加载位置时用（portable 版 localStorage 为空时 fallback 读主进程 JSON）
+    getTopologyPositionsSync: () => {
+      try { return ipcRenderer.sendSync("inspection:getTopologyPositions"); } catch { return null; }
+    },
     // 监控大屏标题同步
     saveDashboardTitle: (title) => ipcRenderer.invoke("inspection:saveDashboardTitle", title),
     getDashboardTitle: () => ipcRenderer.invoke("inspection:getDashboardTitle"),