diff --git a/README.md b/README.md
index 848b126..795bc81 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,14 @@ func main() {
 }
 ```
 
+Build:
+
+Baa use encoding/json as default json package but you can change to [jsoniter](https://github.com/json-iterator/go) by build from other tags
+
+```
+go build -tags=jsoniter .
+```
+
 Run:
 
 ```
diff --git a/README_zh-CN.md b/README_zh-CN.md
index 1cfecc7..f2db185 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -37,6 +37,14 @@ func main() {
 }
 ```
 
+编译:
+
+Baa use encoding/json as default json package but you can change to [jsoniter](https://github.com/json-iterator/go) by build from other tags
+
+```
+go build -tags=jsoniter .
+```
+
 运行:
 
 ```
diff --git a/context.go b/context.go
index fc9004a..34fab42 100644
--- a/context.go
+++ b/context.go
@@ -2,7 +2,6 @@ package baa
 
 import (
 	"bytes"
-	"encoding/json"
 	"encoding/xml"
 	"errors"
 	"fmt"
@@ -288,7 +287,7 @@ func (c *Context) QueryJSON(v interface{}) error {
 	if len(content) == 0 {
 		return ErrJSONPayloadEmpty
 	}
-	return json.Unmarshal(content, v)
+	return Unmarshal(content, v)
 }
 
 // QueryXML decode xml from http.Request.Body
@@ -444,9 +443,9 @@ func (c *Context) JSON(code int, v interface{}) {
 	var re []byte
 	var err error
 	if c.baa.debug {
-		re, err = json.MarshalIndent(v, "", "  ")
+		re, err = MarshalIndent(v, "", "  ")
 	} else {
-		re, err = json.Marshal(v)
+		re, err = Marshal(v)
 	}
 	if err != nil {
 		c.Error(err)
@@ -463,9 +462,9 @@ func (c *Context) JSONString(v interface{}) (string, error) {
 	var re []byte
 	var err error
 	if c.baa.debug {
-		re, err = json.MarshalIndent(v, "", "  ")
+		re, err = MarshalIndent(v, "", "  ")
 	} else {
-		re, err = json.Marshal(v)
+		re, err = Marshal(v)
 	}
 	if err != nil {
 		return "", err
@@ -475,7 +474,7 @@ func (c *Context) JSONString(v interface{}) (string, error) {
 
 // JSONP write data by jsonp format
 func (c *Context) JSONP(code int, callback string, v interface{}) {
-	re, err := json.Marshal(v)
+	re, err := Marshal(v)
 	if err != nil {
 		c.Error(err)
 		return
diff --git a/context_test.go b/context_test.go
index 50b83f5..b74a6eb 100644
--- a/context_test.go
+++ b/context_test.go
@@ -2,7 +2,6 @@ package baa
 
 import (
 	"bytes"
-	"encoding/json"
 	"encoding/xml"
 	"fmt"
 	"io"
@@ -226,7 +225,7 @@ func TestContextQuery1(t *testing.T) {
 				c.QueryJSON(&dataFromBody)
 				So(dataFromBody["test"], ShouldEqual, dataSource["test"])
 			})
-			body, _ := json.Marshal(dataSource)
+			body, _ := Marshal(dataSource)
 			req, _ := http.NewRequest("POST", "/context/json", bytes.NewReader(body))
 			req.Header.Set("Content-Type", ApplicationJSON)
 			w := httptest.NewRecorder()
@@ -241,7 +240,7 @@ func TestContextQuery1(t *testing.T) {
 				c.QueryJSON(dataFromBody)
 				So(dataFromBody, ShouldBeNil)
 			})
-			body, _ := json.Marshal(dataSource)
+			body, _ := Marshal(dataSource)
 			req, _ := http.NewRequest("POST", "/context/json2", bytes.NewReader(body))
 			req.Header.Set("Content-Type", ApplicationJSON)
 			w := httptest.NewRecorder()
@@ -258,7 +257,7 @@ func TestContextQuery1(t *testing.T) {
 				c.QueryJSON(&dataFromBody)
 				So(dataFromBody.Test, ShouldEqual, dataSource["test"])
 			})
-			body, _ := json.Marshal(dataSource)
+			body, _ := Marshal(dataSource)
 			req, _ := http.NewRequest("POST", "/context/json3", bytes.NewReader(body))
 			req.Header.Set("Content-Type", ApplicationJSON)
 			w := httptest.NewRecorder()
diff --git a/json.go b/json.go
new file mode 100644
index 0000000..a8b4272
--- /dev/null
+++ b/json.go
@@ -0,0 +1,11 @@
+// +build !jsoniter
+
+package baa
+
+import "encoding/json"
+
+var (
+	Marshal       = json.Marshal
+	Unmarshal     = json.Unmarshal
+	MarshalIndent = json.MarshalIndent
+)
diff --git a/jsoniter.go b/jsoniter.go
new file mode 100644
index 0000000..e5682c4
--- /dev/null
+++ b/jsoniter.go
@@ -0,0 +1,12 @@
+// +build jsoniter
+
+package baa
+
+import "github.com/json-iterator/go"
+
+var (
+	json          = jsoniter.ConfigCompatibleWithStandardLibrary
+	Marshal       = json.Marshal
+	Unmarshal     = json.Unmarshal
+	MarshalIndent = json.MarshalIndent
+)