diff --git a/core/backend/Dockerfile b/core/backend/Dockerfile
index daa424e..bb99c8a 100644
--- a/core/backend/Dockerfile
+++ b/core/backend/Dockerfile
@@ -32,4 +32,6 @@ RUN chmod +x /usr/local/bin/docker-entrypoint.sh
 
 EXPOSE 8000
 ENTRYPOINT ["docker-entrypoint.sh"]
-CMD ["gunicorn", "airshelf.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "3", "--timeout", "120"]
+# timeout 300:前端已把多图生成拆成「每张一条请求」,单张约 30s;300s 给慢 ARK 留充足余量,
+# 不再因一条请求串行出多张而超时(旧 120s 下生成 4 张必被 worker 强杀 → 500)。
+CMD ["gunicorn", "airshelf.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "3", "--timeout", "300"]
diff --git a/core/frontend/src/App.tsx b/core/frontend/src/App.tsx
index 8796dc5..6b0049f 100644
--- a/core/frontend/src/App.tsx
+++ b/core/frontend/src/App.tsx
@@ -355,7 +355,21 @@ export function App() {
   }
 
   function generateImages(payload: { prompt: string; mode?: "image" | "model" | "cover"; count?: number }) {
-    return action(() => api.generateImage(payload), "图片已生成");
+    // 每张图一条独立 HTTP 请求、并行发出(不再让一条请求串行出 N 张)——
+    // 单张约 30s 不会触发后端请求超时;并行后 N 张总耗时≈单张,也不长时间占用后端进程。
+    // 任一张失败只丢那一张(各自独立扣费/回滚),其余正常返回。
+    const n = Math.max(1, Math.min(Number(payload.count) || 1, 12));
+    return action(async () => {
+      const settled = await Promise.allSettled(
+        Array.from({ length: n }, () => api.generateImage({ prompt: payload.prompt, mode: payload.mode, count: 1 }))
+      );
+      const assets = settled.flatMap((r) => (r.status === "fulfilled" ? r.value.assets : []));
+      if (assets.length === 0) {
+        const firstErr = settled.find((r) => r.status === "rejected") as PromiseRejectedResult | undefined;
+        throw new Error(firstErr ? String((firstErr.reason as Error)?.message || firstErr.reason || "生成失败") : "未生成任何图片");
+      }
+      return { assets };
+    }, "图片已生成");
   }
 
   function onAuthed(payload: { token: string; user: User; team: Team }) {