diff --git a/tour/cmd/dynamodb.go b/tour/cmd/dynamodb.go
index 8e678d7f..43bb7808 100644
--- a/tour/cmd/dynamodb.go
+++ b/tour/cmd/dynamodb.go
@@ -16,9 +16,11 @@ var dynamoLongDesc = strings.Join([]string{
 }, "\n")
 
 var dynamoCmd = &cobra.Command{
-	Use:   "dynamo",
-	Short: "dynamodb to golang struct and base repository",
-	Long:  dynamoLongDesc,
+	Use:       "dynamo",
+	Short:     "dynamodb to golang struct and base repository",
+	Long:      dynamoLongDesc,
+	ValidArgs: []string{"generate"},
+	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
 	Run: func(cmd *cobra.Command, args []string) {
 		if len(args) > 0 {
 			log.Printf("dynamo have no commands named %s, plaese use dynamo --help to see detail", strings.Join(args, ","))
diff --git a/tour/cmd/mongodb.go b/tour/cmd/mongodb.go
index fcd55eb7..852849cf 100644
--- a/tour/cmd/mongodb.go
+++ b/tour/cmd/mongodb.go
@@ -16,9 +16,11 @@ var mongoLongDesc = strings.Join([]string{
 }, "\n")
 
 var mongoCmd = &cobra.Command{
-	Use:   "mongo",
-	Short: "mongodb to golang struct and base repository",
-	Long:  mongoLongDesc,
+	Use:       "mongo",
+	Short:     "mongodb to golang struct and base repository",
+	Long:      mongoLongDesc,
+	ValidArgs: []string{"generate"},
+	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
 	Run: func(cmd *cobra.Command, args []string) {
 		if len(args) > 0 {
 			log.Printf("mongo have no commands named %s, plaese use mongo --help to see detail", strings.Join(args, ","))
diff --git a/tour/cmd/openapi.go b/tour/cmd/openapi.go
index a7809e10..d98418ec 100644
--- a/tour/cmd/openapi.go
+++ b/tour/cmd/openapi.go
@@ -12,13 +12,12 @@ import (
 )
 
 var openapiCmd = &cobra.Command{
-	Use:   "openapi",
-	Short: "openapi generate",
-	Long:  "openapi generate",
+	Use:       "openapi",
+	Short:     "openapi generate",
+	Long:      "openapi generate",
+	ValidArgs: []string{"generate", "swag2openapi"},
+	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
 	Run: func(cmd *cobra.Command, args []string) {
-		if len(args) > 0 {
-			log.Printf("openapi have no commands named %s, plaese use openapi --help to see detail", strings.Join(args, ","))
-		}
 	},
 }
 
diff --git a/tour/cmd/root.go b/tour/cmd/root.go
index 58a5407b..4c4a6f45 100644
--- a/tour/cmd/root.go
+++ b/tour/cmd/root.go
@@ -5,9 +5,11 @@ import (
 )
 
 var rootCmd = &cobra.Command{
-	Use:   "",
-	Short: "",
-	Long:  "",
+	Use:       "",
+	Short:     "",
+	Long:      "",
+	ValidArgs: []string{"dynamo", "mongo", "openapi", "sql", "time", "word"},
+	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
 	Run: func(cmd *cobra.Command, args []string) {
 
 	},
diff --git a/tour/cmd/sql.go b/tour/cmd/sql.go
index 0aaa03f5..65bb1252 100644
--- a/tour/cmd/sql.go
+++ b/tour/cmd/sql.go
@@ -8,10 +8,12 @@ import (
 )
 
 var sqlCmd = &cobra.Command{
-	Use:   "sql",
-	Short: "sql",
-	Long:  "sql",
-	Run:   func(cmd *cobra.Command, Args []string) {},
+	Use:       "sql",
+	Short:     "sql",
+	Long:      "sql",
+	ValidArgs: []string{"struct"},
+	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
+	Run:       func(cmd *cobra.Command, Args []string) {},
 }
 
 var sql2structCmd = &cobra.Command{
diff --git a/tour/cmd/time.go b/tour/cmd/time.go
index 78aeff9a..f1a2a16a 100644
--- a/tour/cmd/time.go
+++ b/tour/cmd/time.go
@@ -11,9 +11,11 @@ import (
 )
 
 var timeCmd = &cobra.Command{
-	Use:   "time",
-	Short: "time format",
-	Long:  "time format",
+	Use:       "time",
+	Short:     "time format",
+	Long:      "time format",
+	ValidArgs: []string{"now", "calc"},
+	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
 	Run: func(cmd *cobra.Command, args []string) {
 		// nowTime := timer.GetNowTime()
 		// log.Printf("output  %s,   %d", nowTime.Format("2006-01-02 15:04:05"), nowTime.Unix())
diff --git a/tour/cmd/word.go b/tour/cmd/word.go
index 9c34c92b..77a724a8 100644
--- a/tour/cmd/word.go
+++ b/tour/cmd/word.go
@@ -23,6 +23,7 @@ var wordCmd = &cobra.Command{
 	Use:   "word",
 	Short: "change word",
 	Long:  desc,
+	Args:      cobra.MatchAll(cobra.ExactArgs(1), cobra.OnlyValidArgs),
 	Run: func(cmd *cobra.Command, args []string) {
 		var content string
 		switch mode {