diff --git a/backend/cmd/server/wire_gen.go b/backend/cmd/server/wire_gen.go
index d3c5adc7dc..18f5fc4ef6 100644
--- a/backend/cmd/server/wire_gen.go
+++ b/backend/cmd/server/wire_gen.go
@@ -177,7 +177,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	soraGenerationService := service.NewSoraGenerationService(soraGenerationRepository, soraStorageRouter, soraQuotaService)
 	settingHandler := admin.NewSettingHandler(settingService, emailService, turnstileService, opsService, soraS3Storage)
 	soraGDriveOAuthService := service.NewSoraGDriveOAuthService(settingService)
-	gdriveOAuthHandler := admin.NewGDriveOAuthHandler(settingService, soraGDriveOAuthService)
+	gdriveOAuthHandler := admin.NewGDriveOAuthHandler(settingService, soraGDriveOAuthService, soraGDriveStorage)
 	opsHandler := admin.NewOpsHandler(opsService)
 	updateCache := repository.NewUpdateCache(redisClient)
 	gitHubReleaseClient := repository.ProvideGitHubReleaseClient(configConfig)
diff --git a/backend/internal/handler/admin/gdrive_oauth_handler.go b/backend/internal/handler/admin/gdrive_oauth_handler.go
index bea604bccf..bdf549066c 100644
--- a/backend/internal/handler/admin/gdrive_oauth_handler.go
+++ b/backend/internal/handler/admin/gdrive_oauth_handler.go
@@ -13,13 +13,15 @@ import (
 type GDriveOAuthHandler struct {
 	settingService *service.SettingService
 	gdriveOAuth    *service.SoraGDriveOAuthService
+	gdriveStorage  *service.SoraGDriveStorage
 }
 
 // NewGDriveOAuthHandler 创建 GDrive OAuth Handler。
-func NewGDriveOAuthHandler(settingService *service.SettingService, gdriveOAuth *service.SoraGDriveOAuthService) *GDriveOAuthHandler {
+func NewGDriveOAuthHandler(settingService *service.SettingService, gdriveOAuth *service.SoraGDriveOAuthService, gdriveStorage *service.SoraGDriveStorage) *GDriveOAuthHandler {
 	return &GDriveOAuthHandler{
 		settingService: settingService,
 		gdriveOAuth:    gdriveOAuth,
+		gdriveStorage:  gdriveStorage,
 	}
 }
 
@@ -127,3 +129,20 @@ func (h *GDriveOAuthHandler) OAuthCallback(c *gin.Context) {
 		"message":       "OAuth 授权成功",
 	})
 }
+
+// TestGDriveStorage 测试 GDrive 存储的完整上传→下载→删除流程。
+// POST /api/v1/admin/settings/sora-storage/gdrive-test
+func (h *GDriveOAuthHandler) TestGDriveStorage(c *gin.Context) {
+	if h.gdriveStorage == nil {
+		response.Error(c, http.StatusInternalServerError, "GDrive storage not initialized")
+		return
+	}
+
+	result, err := h.gdriveStorage.TestFullCycle(c.Request.Context())
+	if err != nil {
+		response.Error(c, http.StatusBadRequest, "GDrive 测试失败: "+err.Error())
+		return
+	}
+
+	response.Success(c, result)
+}
diff --git a/backend/internal/server/routes/admin.go b/backend/internal/server/routes/admin.go
index b3267cb660..a00cb5849d 100644
--- a/backend/internal/server/routes/admin.go
+++ b/backend/internal/server/routes/admin.go
@@ -413,6 +413,7 @@ func registerSettingsRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		// Google Drive OAuth
 		adminSettings.POST("/sora-storage/gdrive-oauth/start", h.Admin.GDriveOAuth.StartOAuth)
 		adminSettings.POST("/sora-storage/gdrive-oauth/callback", h.Admin.GDriveOAuth.OAuthCallback)
+		adminSettings.POST("/sora-storage/gdrive-test", h.Admin.GDriveOAuth.TestGDriveStorage)
 	}
 }
 
diff --git a/backend/internal/service/sora_gdrive_storage.go b/backend/internal/service/sora_gdrive_storage.go
index b43f34b2d9..5b3c974211 100644
--- a/backend/internal/service/sora_gdrive_storage.go
+++ b/backend/internal/service/sora_gdrive_storage.go
@@ -188,6 +188,66 @@ func (s *SoraGDriveStorage) TestConnection(ctx context.Context) error {
 	return nil
 }
 
+// TestFullCycle 执行完整的上传→获取链接→删除测试。
+func (s *SoraGDriveStorage) TestFullCycle(ctx context.Context) (map[string]any, error) {
+	srv, cfg, err := s.getService(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("init client: %w", err)
+	}
+
+	result := map[string]any{}
+
+	// 1. 测试 API 连接
+	about, err := srv.About.Get().Fields("storageQuota").Context(ctx).Do()
+	if err != nil {
+		return nil, fmt.Errorf("API connection failed: %w", err)
+	}
+	if about.StorageQuota != nil {
+		result["quota_limit_bytes"] = about.StorageQuota.Limit
+		result["quota_used_bytes"] = about.StorageQuota.Usage
+	}
+
+	// 2. 上传测试文件
+	testContent := "sub2api GDrive test file - " + time.Now().Format(time.RFC3339)
+	fileMeta := &drive.File{
+		Name:     "sub2api_test_" + uuid.NewString()[:8] + ".txt",
+		MimeType: "text/plain",
+	}
+	if cfg.FolderID != "" {
+		fileMeta.Parents = []string{cfg.FolderID}
+	}
+	uploaded, err := srv.Files.Create(fileMeta).
+		Media(strings.NewReader(testContent)).
+		Fields("id,name,size,webViewLink").
+		Context(ctx).Do()
+	if err != nil {
+		return nil, fmt.Errorf("upload test file failed: %w", err)
+	}
+	result["uploaded_file_id"] = uploaded.Id
+	result["uploaded_file_name"] = uploaded.Name
+	result["uploaded_file_size"] = uploaded.Size
+	result["web_view_link"] = uploaded.WebViewLink
+
+	// 3. 获取访问链接
+	accessURL, err := s.GetAccessURL(ctx, uploaded.Id)
+	if err != nil {
+		// 即使获取链接失败，仍尝试清理
+		_ = srv.Files.Delete(uploaded.Id).Context(ctx).Do()
+		return nil, fmt.Errorf("get access URL failed: %w", err)
+	}
+	result["access_url"] = accessURL
+
+	// 4. 删除测试文件
+	if err := srv.Files.Delete(uploaded.Id).Context(ctx).Do(); err != nil {
+		result["delete_warning"] = fmt.Sprintf("delete failed (manual cleanup needed): %v", err)
+	} else {
+		result["deleted"] = true
+	}
+
+	result["status"] = "ok"
+	return result, nil
+}
+
 // IsHealthy 返回 Google Drive 健康状态（带短缓存）。
 func (s *SoraGDriveStorage) IsHealthy(ctx context.Context) bool {
 	if s == nil {