diff --git a/pkg/storage/minio.go b/pkg/storage/minio.go
index 909446a..31ac10d 100644
--- a/pkg/storage/minio.go
+++ b/pkg/storage/minio.go
@@ -79,57 +79,6 @@ func (s *StorageClient) GetBucket(name string) (string, error) {
 	return bucket, nil
 }
 
-// GeneratePresignedURL 生成预签名上传URL (PUT方法)
-func (s *StorageClient) GeneratePresignedURL(ctx context.Context, bucketName, objectName string, expires time.Duration) (string, error) {
-	url, err := s.client.PresignedPutObject(ctx, bucketName, objectName, expires)
-	if err != nil {
-		return "", fmt.Errorf("生成预签名URL失败: %w", err)
-	}
-	return url.String(), nil
-}
-
-// PresignedPostPolicyResult 预签名POST策略结果
-type PresignedPostPolicyResult struct {
-	PostURL  string            // POST的URL
-	FormData map[string]string // 表单数据
-	FileURL  string            // 文件的最终访问URL
-}
-
-// GeneratePresignedPostURL 生成预签名POST URL (支持表单上传)
-// 注意：使用时必须确保file字段是表单的最后一个字段
-func (s *StorageClient) GeneratePresignedPostURL(ctx context.Context, bucketName, objectName string, minSize, maxSize int64, expires time.Duration) (*PresignedPostPolicyResult, error) {
-	// 创建上传策略
-	policy := minio.NewPostPolicy()
-
-	// 设置策略的基本信息
-	policy.SetBucket(bucketName)
-	policy.SetKey(objectName)
-	policy.SetExpires(time.Now().UTC().Add(expires))
-
-	// 设置文件大小限制
-	if err := policy.SetContentLengthRange(minSize, maxSize); err != nil {
-		return nil, fmt.Errorf("设置文件大小限制失败: %w", err)
-	}
-
-	// 使用MinIO客户端和策略生成预签名的POST URL和表单数据
-	postURL, formData, err := s.client.PresignedPostPolicy(ctx, policy)
-	if err != nil {
-		return nil, fmt.Errorf("生成预签名POST URL失败: %w", err)
-	}
-
-	// 移除form_data中多余的bucket字段（MinIO Go SDK可能会添加这个字段，但会导致签名错误）
-	// 注意：在Go中直接delete不存在的key是安全的
-	delete(formData, "bucket")
-
-	// 使用配置的公开访问URL构造文件的永久访问URL
-	fileURL := s.BuildFileURL(bucketName, objectName)
-
-	return &PresignedPostPolicyResult{
-		PostURL:  postURL.String(),
-		FormData: formData,
-		FileURL:  fileURL,
-	}, nil
-}
 
 // BuildFileURL 构建文件的公开访问URL
 func (s *StorageClient) BuildFileURL(bucketName, objectName string) string {
diff --git a/pkg/storage/minio_test.go b/pkg/storage/minio_test.go
index 0c15d92..6f3c32d 100644
--- a/pkg/storage/minio_test.go
+++ b/pkg/storage/minio_test.go
@@ -42,30 +42,3 @@ func TestNewStorage_SkipConnectWhenNoCreds(t *testing.T) {
 	}
 }
 
-func TestPresignedHelpers_WithNilClient(t *testing.T) {
-	s := &StorageClient{
-		client:    (*minio.Client)(nil),
-		buckets:   map[string]string{"textures": "tex-bkt"},
-		publicURL: "http://localhost:9000",
-	}
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-	defer cancel()
-
-	// 预期会panic（nil client），用recover捕获
-	func() {
-		defer func() {
-			if r := recover(); r == nil {
-				t.Fatalf("GeneratePresignedURL expected panic with nil client")
-			}
-		}()
-		_, _ = s.GeneratePresignedURL(ctx, "tex-bkt", "obj", time.Minute)
-	}()
-	func() {
-		defer func() {
-			if r := recover(); r == nil {
-				t.Fatalf("GeneratePresignedPostURL expected panic with nil client")
-			}
-		}()
-		_, _ = s.GeneratePresignedPostURL(ctx, "tex-bkt", "obj", 0, 10, time.Minute)
-	}()
-}