diff --git a/tools/goctl/api/docgen/doc.go b/tools/goctl/api/docgen/doc.go
index 1f5cb55a3e76..5ad264a14734 100644
--- a/tools/goctl/api/docgen/doc.go
+++ b/tools/goctl/api/docgen/doc.go
@@ -24,9 +24,10 @@ const (
 - Request: {{.requestType}}
 - Response: {{.responseType}}
 
+2. 请求定义
+{{.requestContent}}
 
-2. 类型定义 
-
+3. 返回定义
 {{.responseContent}}  
 
 `
@@ -46,7 +47,12 @@ func genDoc(api *spec.ApiSpec, dir string, filename string) error {
 			routeComment = "N/A"
 		}
 
-		responseContent, err := responseBody(api, route)
+		requestContent, err := buildDoc(route.RequestType)
+		if err != nil {
+			return err
+		}
+
+		responseContent, err := buildDoc(route.ResponseType)
 		if err != nil {
 			return err
 		}
@@ -60,6 +66,7 @@ func genDoc(api *spec.ApiSpec, dir string, filename string) error {
 			"uri":             route.Path,
 			"requestType":     "`" + stringx.TakeOne(route.RequestTypeName(), "-") + "`",
 			"responseType":    "`" + stringx.TakeOne(route.ResponseTypeName(), "-") + "`",
+			"requestContent":  requestContent,
 			"responseContent": responseContent,
 		})
 		if err != nil {
@@ -72,14 +79,14 @@ func genDoc(api *spec.ApiSpec, dir string, filename string) error {
 	return err
 }
 
-func responseBody(api *spec.ApiSpec, route spec.Route) (string, error) {
-	if len(route.ResponseTypeName()) == 0 {
+func buildDoc(route spec.Type) (string, error) {
+	if route == nil || len(route.Name()) == 0 {
 		return "", nil
 	}
 
 	var tps = make([]spec.Type, 0)
-	tps = append(tps, route.ResponseType)
-	if definedType, ok := route.ResponseType.(spec.DefineStruct); ok {
+	tps = append(tps, route)
+	if definedType, ok := route.(spec.DefineStruct); ok {
 		associatedTypes(definedType, &tps)
 	}
 	value, err := gogen.BuildTypes(tps)
@@ -91,7 +98,17 @@ func responseBody(api *spec.ApiSpec, route spec.Route) (string, error) {
 }
 
 func associatedTypes(tp spec.DefineStruct, tps *[]spec.Type) {
-	*tps = append(*tps, tp)
+	var hasAdded = false
+	for _, item := range *tps {
+		if item.Name() == tp.Name() {
+			hasAdded = true
+			break
+		}
+	}
+	if !hasAdded {
+		*tps = append(*tps, tp)
+	}
+
 	for _, item := range tp.Members {
 		if definedType, ok := item.Type.(spec.DefineStruct); ok {
 			associatedTypes(definedType, tps)
diff --git a/tools/goctl/api/docgen/gen.go b/tools/goctl/api/docgen/gen.go
index c0fb8dad3d27..840ab8a89941 100644
--- a/tools/goctl/api/docgen/gen.go
+++ b/tools/goctl/api/docgen/gen.go
@@ -8,43 +8,50 @@ import (
 	"strings"
 
 	"github.com/tal-tech/go-zero/tools/goctl/api/parser"
+	"github.com/tal-tech/go-zero/tools/goctl/util"
 	"github.com/urfave/cli"
 )
 
-var docDir = "doc"
-
 func DocCommand(c *cli.Context) error {
 	dir := c.String("dir")
 	if len(dir) == 0 {
 		return errors.New("missing -dir")
 	}
 
-	files, err := filePathWalkDir(dir)
+	outputDir := c.String("o")
+	if len(outputDir) == 0 {
+		var err error
+		outputDir, err = os.Getwd()
+		if err != nil {
+			return err
+		}
+	}
+
+	if !util.FileExists(dir) {
+		return errors.New(fmt.Sprintf("dir %s not exsit", dir))
+	}
+
+	dir, err := filepath.Abs(dir)
 	if err != nil {
-		return fmt.Errorf("dir %s not exist", dir)
+		return err
 	}
 
-	err = os.RemoveAll(dir + "/" + docDir + "/")
+	files, err := filePathWalkDir(dir)
 	if err != nil {
 		return err
 	}
-	for _, f := range files {
-		api, err := parser.Parse(f)
+
+	for _, path := range files {
+		api, err := parser.Parse(path)
 		if err != nil {
-			return fmt.Errorf("parse file: %s, err: %s", f, err.Error())
+			return fmt.Errorf("parse file: %s, err: %s", path, err.Error())
 		}
 
-		index := strings.Index(f, dir)
-		if index < 0 {
-			continue
-		}
-		dst := dir + "/" + docDir + f[index+len(dir):]
-		index = strings.LastIndex(dst, "/")
-		if index < 0 {
-			continue
+		err = genDoc(api, filepath.Dir(filepath.Join(outputDir, path[len(dir):])),
+			strings.Replace(path[len(filepath.Dir(path)):], ".api", ".md", 1))
+		if err != nil {
+			return err
 		}
-		dir := dst[:index]
-		genDoc(api, dir, strings.Replace(dst[index+1:], ".api", ".md", 1))
 	}
 	return nil
 }
diff --git a/tools/goctl/goctl.go b/tools/goctl/goctl.go
index 997a40f7197c..66b0219d7635 100644
--- a/tools/goctl/goctl.go
+++ b/tools/goctl/goctl.go
@@ -89,6 +89,11 @@ var (
 							Name:  "dir",
 							Usage: "the target dir",
 						},
+						cli.StringFlag{
+							Name:     "o",
+							Required: false,
+							Usage:    "the output markdown directory",
+						},
 					},
 					Action: docgen.DocCommand,
 				},