diff --git a/mime_type.go b/mime_type.go
index 9585004..b0cef65 100644
--- a/mime_type.go
+++ b/mime_type.go
@@ -146,6 +146,7 @@ const (
 	MimeTypeTextPlain = "text/plain"
 	// MimeTypeXWWWFormUrlencoded  <form encType=””>中默认的encType，form表单数据被编码为key/value格式发送到服务器（表单默认的提交数据的格式）
 	MimeTypeXWWWFormUrlencoded = "application/x-www-form-urlencoded"
+	MimeTypeMultipartFormData  = "multipart/form-data"
 	// MimeTypeXml xml请求方式
 	MimeTypeXml = "application/xml"
 	// MimeTypeAcc acc音频