diff --git a/frontend/app/agency/briefs/[id]/page.tsx b/frontend/app/agency/briefs/[id]/page.tsx
index 44fd2b7..179ade0 100644
--- a/frontend/app/agency/briefs/[id]/page.tsx
+++ b/frontend/app/agency/briefs/[id]/page.tsx
@@ -417,10 +417,19 @@ export default function BriefConfigPage() {
       return
     }
     try {
-      const signedUrl = await api.getSignedUrl(file.url, 3600, true)
-      window.open(signedUrl, '_blank')
+      const signedUrl = await api.getSignedUrl(file.url)
+      const resp = await fetch(signedUrl)
+      const blob = await resp.blob()
+      const blobUrl = URL.createObjectURL(blob)
+      const a = document.createElement('a')
+      a.href = blobUrl
+      a.download = file.name
+      document.body.appendChild(a)
+      a.click()
+      document.body.removeChild(a)
+      URL.revokeObjectURL(blobUrl)
     } catch {
-      toast.error('获取下载链接失败')
+      toast.error('下载失败')
     }
   }
 
@@ -660,10 +669,19 @@ export default function BriefConfigPage() {
       return
     }
     try {
-      const signedUrl = await api.getSignedUrl(file.url, 3600, true)
-      window.open(signedUrl, '_blank')
+      const signedUrl = await api.getSignedUrl(file.url)
+      const resp = await fetch(signedUrl)
+      const blob = await resp.blob()
+      const blobUrl = URL.createObjectURL(blob)
+      const a = document.createElement('a')
+      a.href = blobUrl
+      a.download = file.name
+      document.body.appendChild(a)
+      a.click()
+      document.body.removeChild(a)
+      URL.revokeObjectURL(blobUrl)
     } catch {
-      toast.error('获取下载链接失败')
+      toast.error('下载失败')
     }
   }