diff --git a/envutil/envutil_test.go b/envutil/envutil_test.go
index e66c2f3d6..86dec11a9 100644
--- a/envutil/envutil_test.go
+++ b/envutil/envutil_test.go
@@ -50,7 +50,7 @@ func TestParseEnvValue(t *testing.T) {
 	}, func() {
 		is.Eq("abc", Getenv("FirstEnv"))
 		is.Eq("def", Getenv("SecondEnv"))
-		is.Eq("abc/def", ParseEnvValue(rVal))
+		is.Eq("abc/def", ParseValue(rVal))
 		is.Eq("abc string", VarReplace("${FirstEnv} string"))
 	})
 
diff --git a/structs/tags.go b/structs/tags.go
index 96468cb37..2586b9514 100644
--- a/structs/tags.go
+++ b/structs/tags.go
@@ -6,6 +6,7 @@ import (
 	"reflect"
 	"strings"
 
+	"github.com/gookit/goutil/arrutil"
 	"github.com/gookit/goutil/maputil"
 	"github.com/gookit/goutil/strutil"
 )
@@ -208,7 +209,9 @@ func ParseTagValueDefault(field, tagVal string) (mp maputil.SMap, err error) {
 // Examples:
 //
 //	eg: "desc;required;default;shorts"
-//	type My
+//	type MyStruct {
+//		Age int `flag:"int option message;;a,b"`
+//	}
 //	sepStr := ";"
 //	defines := []string{"desc", "required", "default", "shorts"}
 func ParseTagValueDefine(sep string, defines []string) TagValFunc {
@@ -233,7 +236,7 @@ func ParseTagValueDefine(sep string, defines []string) TagValFunc {
 // ParseTagValueNamed parse k-v tag value string. it's like INI format contents.
 //
 // eg: "name=int0;shorts=i;required=true;desc=int option message"
-func ParseTagValueNamed(field, tagVal string) (mp maputil.SMap, err error) {
+func ParseTagValueNamed(field, tagVal string, keys ...string) (mp maputil.SMap, err error) {
 	ss := strutil.Split(tagVal, ";")
 	ln := len(ss)
 	if ln == 0 {
@@ -249,6 +252,10 @@ func ParseTagValueNamed(field, tagVal string) (mp maputil.SMap, err error) {
 
 		kvNodes := strings.SplitN(s, "=", 2)
 		key, val := kvNodes[0], strings.TrimSpace(kvNodes[1])
+		if len(keys) > 0 && !arrutil.StringsHas(keys, key) {
+			err = fmt.Errorf("parse tag error on field '%s': invalid key name '%s'", field, key)
+			return
+		}
 
 		mp[key] = val
 	}
diff --git a/structs/tags_test.go b/structs/tags_test.go
index d0826ed56..a4d83ef05 100644
--- a/structs/tags_test.go
+++ b/structs/tags_test.go
@@ -212,4 +212,7 @@ func TestParseTagValueNamed(t *testing.T) {
 	assert.NoErr(t, err)
 	assert.NotEmpty(t, mp)
 	assert.Eq(t, "inhere", mp.Str("default"))
+
+	mp, err = structs.ParseTagValueNamed("name", "name=n;default=inhere", "name")
+	assert.ErrSubMsg(t, err, "parse tag error on field 'name'")
 }