diff --git a/flow/flow_test.go b/flow/flow_test.go
index 429cb9f3..79f13836 100644
--- a/flow/flow_test.go
+++ b/flow/flow_test.go
@@ -20,5 +20,5 @@ func check(t *testing.T) {
 	for key := range gou.Flows {
 		keys = append(keys, key)
 	}
-	assert.Equal(t, 22, len(keys))
+	assert.Equal(t, 23, len(keys))
 }
diff --git a/helper/hex.process.go b/helper/hex.process.go
new file mode 100644
index 00000000..d43be53a
--- /dev/null
+++ b/helper/hex.process.go
@@ -0,0 +1,22 @@
+package helper
+
+import (
+	"encoding/hex"
+
+	"github.com/yaoapp/gou"
+	"github.com/yaoapp/kun/log"
+)
+
+// ProcessHexToString xiang.helper.HexToString
+func ProcessHexToString(process *gou.Process) interface{} {
+	process.ValidateArgNums(1)
+
+	switch process.Args[0].(type) {
+	case string:
+		return hex.EncodeToString([]byte(process.Args[0].(string)))
+	case []byte:
+		return hex.EncodeToString(process.Args[0].([]byte))
+	}
+	log.With(log.F{"input": process.Args[0]}).Error("HexToString: type does not support")
+	return nil
+}
diff --git a/helper/hex_test.go b/helper/hex_test.go
new file mode 100644
index 00000000..bca5e63a
--- /dev/null
+++ b/helper/hex_test.go
@@ -0,0 +1,61 @@
+package helper
+
+import (
+	"os"
+	"path"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/yaoapp/gou"
+	"github.com/yaoapp/yao/flow"
+	"github.com/yaoapp/yao/share"
+)
+
+func TestProcessHexToString(t *testing.T) {
+	res, err := gou.NewProcess("xiang.helper.HexToString", []byte{0x0, 0x1}).Exec()
+	assert.Nil(t, err)
+	assert.Equal(t, "0001", res)
+
+	res, err = gou.NewProcess("xiang.helper.HexToString", string([]byte{0x0, 0x1})).Exec()
+	assert.Nil(t, err)
+	assert.Equal(t, "0001", res)
+
+	res, err = gou.NewProcess("xiang.helper.HexToString", 1024).Exec()
+	assert.Nil(t, err)
+	assert.Nil(t, res)
+}
+
+func TestProcessHexToStringInFlow(t *testing.T) {
+	testflow := path.Join(os.Getenv("YAO_DEV"), "tests", "flows", "helper")
+	flow.LoadFrom(testflow, "helper.")
+
+	res, err := gou.NewProcess("flows.helper.HexToString").Exec()
+	assert.Nil(t, err)
+	assert.Equal(t, "6162", res) // ab
+}
+
+func TestProcessHexToStringInScript(t *testing.T) {
+	testscirpt := path.Join(os.Getenv("YAO_DEV"), "tests", "scripts")
+	share.LoadFrom(testscirpt)
+
+	res, err := gou.NewProcess("scripts.helper.HexToStringString").Exec()
+	assert.Nil(t, err)
+	assert.Equal(t, "6162", res) // ab
+
+	res, err = gou.NewProcess("scripts.helper.HexToStringBytes", []byte{0x0, 0x1}).Exec()
+	assert.Nil(t, err)
+	assert.Equal(t, "0001", res) // []byte{0x0, 0x1}
+}
+
+func TestProcessBufferInScript(t *testing.T) {
+	testscirpt := path.Join(os.Getenv("YAO_DEV"), "tests", "scripts")
+	share.LoadFrom(testscirpt)
+
+	res, err := gou.NewProcess("scripts.helper.Buffer").Exec()
+	assert.Nil(t, err)
+
+	str, ok := res.(string)
+	assert.True(t, ok)
+	assert.Equal(t, []byte{0x0, 0x1}, []byte(str))
+
+}
diff --git a/helper/process.go b/helper/process.go
index 73d43e24..7de681f8 100644
--- a/helper/process.go
+++ b/helper/process.go
@@ -27,6 +27,8 @@ func init() {
 	gou.RegisterProcessHandler("xiang.helper.MapDel", ProcessMapDel)
 	gou.RegisterProcessHandler("xiang.helper.MapMultiDel", ProcessMapMultiDel)
 
+	gou.RegisterProcessHandler("xiang.helper.HexToString", ProcessHexToString)
+
 	gou.RegisterProcessHandler("xiang.helper.StrConcat", ProcessStrConcat)
 
 	gou.RegisterProcessHandler("xiang.helper.Captcha", ProcessCaptcha)
@@ -64,6 +66,7 @@ func init() {
 
 	gou.RegisterProcessHandler("xiang.flow.Sleep", ProcessSleep)
 	gou.AliasProcess("xiang.flow.Sleep", "xiang.sys.Sleep")
+
 }
 
 // ProcessPrint xiang.helper.Print 打印语句
diff --git a/tests/flows/helper/hextostring.flow.json b/tests/flows/helper/hextostring.flow.json
new file mode 100644
index 00000000..48fc2375
--- /dev/null
+++ b/tests/flows/helper/hextostring.flow.json
@@ -0,0 +1,13 @@
+{
+  "label": "HexToString",
+  "version": "1.0.0",
+  "description": "HexToString",
+  "nodes": [
+    {
+      "name": "Value",
+      "process": "xiang.helper.HexToString",
+      "args": ["ab"]
+    }
+  ],
+  "output": "{{$res.Value}}"
+}
diff --git a/tests/scripts/helper.js b/tests/scripts/helper.js
new file mode 100644
index 00000000..05b95d1f
--- /dev/null
+++ b/tests/scripts/helper.js
@@ -0,0 +1,18 @@
+function HexToStringString() {
+  return Process("xiang.helper.HexToString", "ab");
+}
+
+function HexToStringBytes(data) {
+  return Process("xiang.helper.HexToString", data);
+}
+
+function Buffer() {
+  var buffer = new Uint8Array(2);
+  buffer[0] = 0x0;
+  buffer[1] = 0x1;
+  return BufferToString(buffer);
+}
+
+function BufferToString(buffer) {
+  return String.fromCharCode.apply(null, new Uint8Array(buffer));
+}