diff --git a/src/main/main.ts b/src/main/main.ts
index 3e11c9a..b466956 100644
--- a/src/main/main.ts
+++ b/src/main/main.ts
@@ -165,4 +165,6 @@ app.on('window-all-closed', () => {
 
 app.on('before-quit', () => {
   isQuitting = true;
+  // 通知渲染进程释放显存
+  mainWindow?.webContents.send('app-quit');
 });
diff --git a/src/main/preload.ts b/src/main/preload.ts
index c7afa48..8c5b942 100644
--- a/src/main/preload.ts
+++ b/src/main/preload.ts
@@ -33,6 +33,9 @@ contextBridge.exposeInMainWorld('metonaDesktop', {
   onTrayAction: (callback: (action: string) => void) => {
     ipcRenderer.on('tray-action', (_: unknown, action: string) => callback(action));
   },
+  onAppQuit: (callback: () => void) => {
+    ipcRenderer.on('app-quit', () => callback());
+  },
   removeAllListeners: (channel: string) => {
     ipcRenderer.removeAllListeners(channel);
   }
diff --git a/src/renderer/main.ts b/src/renderer/main.ts
index 0f4e02b..f225f5b 100644
--- a/src/renderer/main.ts
+++ b/src/renderer/main.ts
@@ -77,6 +77,15 @@ function setupDesktopIntegration(): void {
     }
   }) as EventListener);
 
+  // 退出时释放显存
+  bridge.onAppQuit(() => {
+    const api = state.get<OllamaAPI | null>(KEYS.API);
+    const model = state.get<string>('_defaultModel', '');
+    if (api && model) {
+      api.chat({ model, messages: [], keep_alive: 0 } as any).catch(() => {});
+    }
+  });
+
   // 桌面端快捷键
   document.addEventListener('keydown', (e) => {
     if (e.ctrlKey && e.key === 'n') {
diff --git a/src/renderer/types.d.ts b/src/renderer/types.d.ts
index 0d2f556..7416700 100644
--- a/src/renderer/types.d.ts
+++ b/src/renderer/types.d.ts
@@ -214,6 +214,7 @@ export interface MetonaDesktopAPI {
   openExternal: (url: string) => void;
   onMenuAction: (callback: (action: string) => void) => void;
   onTrayAction: (callback: (action: string) => void) => void;
+  onAppQuit: (callback: () => void) => void;
   removeAllListeners: (channel: string) => void;
 }