diff --git a/lib/upload.go b/lib/upload.go
index 8162bdb..747a87e 100644
--- a/lib/upload.go
+++ b/lib/upload.go
@@ -52,7 +52,7 @@ func (this *UploadConfig) Handle() Handle {
 			return nil, errors.New("文件类型限制不可上传")
 		}
 
-		if !this.size(file.Size) {
+		if this.Size > 0 && !this.size(file.Size) {
 			return nil, errors.New("文件过大不可上传")
 		}
 		// 判断目录是否存在