diff --git a/backend/internal/service/storage.go b/backend/internal/service/storage.go
index dbd43d0..da6e3a8 100644
--- a/backend/internal/service/storage.go
+++ b/backend/internal/service/storage.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"net/url"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -57,6 +58,7 @@ func (s *StorageService) Upload(ctx context.Context, key string, data []byte) (s
 	err = uploadMgr.UploadReader(ctx, bytes.NewReader(data), &uploader.ObjectOptions{
 		BucketName: s.bucket,
 		ObjectName: &key,
+		FileName:   filepath.Base(key),
 	}, nil)
 	if err != nil {
 		l.Error("qiniu upload failed", "key", key, "error", err)