diff --git a/base.go b/base.go
index df2d88a..e8c6f07 100644
--- a/base.go
+++ b/base.go
@@ -10,10 +10,12 @@ import (
 func buildBodyRequest(ver, rawurl string, body *Body) *http.Request {
 	var req *http.Request
 	var err error
+	contentType := ""
 
 	if body.IOBody == nil {
 		req, err = http.NewRequest(ver, rawurl, nil)
 	} else {
+		contentType = TypeURLENCODED
 		var bodybuf *bytes.Buffer
 		switch body.IOBody.(type) {
 		case []byte:
@@ -30,10 +32,12 @@ func buildBodyRequest(ver, rawurl string, body *Body) *http.Request {
 		panic(err)
 	}
 
-	if body.ContentType == "" {
-		req.Header.Set(HeaderKeyContentType, TypeURLENCODED)
-	} else {
-		req.Header.Set(HeaderKeyContentType, body.ContentType)
+	if body.ContentType != "" {
+		contentType = body.ContentType
+	}
+
+	if contentType != "" {
+		req.Header.Set(HeaderKeyContentType, contentType)
 	}
 
 	return req
diff --git a/session.go b/session.go
index 513d435..aaedacf 100644
--- a/session.go
+++ b/session.go
@@ -48,6 +48,8 @@ const (
 	TypeXML = "text/xml"
 	// TypeURLENCODED 类型
 	TypeURLENCODED = "application/x-www-form-urlencoded"
+	// TypeForm PostForm类型
+	TypeForm = TypeURLENCODED
 	// TypeFormData 类型
 	TypeFormData = "multipart/form-data"
 	// HeaderKeyHost Host
diff --git a/workflow.go b/workflow.go
index ca7522b..202fa51 100644
--- a/workflow.go
+++ b/workflow.go
@@ -1,6 +1,7 @@
 package requests
 
 import (
+	"log"
 	"net/http"
 	"net/url"
 	"regexp"
@@ -231,6 +232,7 @@ func mergeMapList(headers ...map[string][]string) map[string][]string {
 // setHeaderRequest 设置request的头
 func setHeaderRequest(req *http.Request, wf *Workflow) {
 	req.Header = mergeMapList(req.Header, wf.session.Header, wf.Header)
+	log.Println(wf.Header, wf.session.Header)
 }
 
 // setHeaderRequest 设置request的临时Cookie, 永久需要在session上设置cookie