diff --git a/service/src/utils/download.ts b/service/src/utils/download.ts
index 50a67c2..8bddac1 100644
--- a/service/src/utils/download.ts
+++ b/service/src/utils/download.ts
@@ -40,7 +40,7 @@ const saveScreenshot = async (url: string, { path, width, height, thumbPath, siz
       devices && (await page.emulate(devices))
     }
     // 自动模式下页面加载完毕立即截图
-    if (prevent === false) {
+    if (!prevent) {
       page.on('load', async () => {
         clearTimeout(regulators)
         await autoScroll(page)