diff --git a/pkg/packets/packets.go b/pkg/packets/packets.go
index 3b04732e..113b3cce 100644
--- a/pkg/packets/packets.go
+++ b/pkg/packets/packets.go
@@ -345,10 +345,6 @@ func readUint32(r *bytes.Buffer) (uint32, error) {
 	return binary.BigEndian.Uint32(r.Next(4)), nil
 }
 
-func readBinary(r *bytes.Buffer) (b []byte, err error) {
-	return readUTF8String(false, r)
-}
-
 func readUTF8String(mustUTF8 bool, r *bytes.Buffer) (b []byte, err error) {
 	if r.Len() < 2 {
 		return nil, codes.ErrMalformed
@@ -553,8 +549,6 @@ func ValidTopicFilter(mustUTF8 bool, p []byte) bool {
 	return true
 }
 
-// TopicMatch 返回topic和topic filter是否
-//
 // TopicMatch returns whether the topic and topic filter is matched.
 func TopicMatch(topic []byte, topicFilter []byte) bool {
 	var spos int
diff --git a/plugin/admin/publish.go b/plugin/admin/publish.go
index 44c53480..ffc0b429 100644
--- a/plugin/admin/publish.go
+++ b/plugin/admin/publish.go
@@ -19,7 +19,7 @@ func (p *publisher) mustEmbedUnimplementedPublishServiceServer() {
 
 // Publish publishes a message into broker.
 func (p *publisher) Publish(ctx context.Context, req *PublishRequest) (resp *empty.Empty, err error) {
-	if !packets.ValidV5Topic([]byte(req.TopicName)) {
+	if !packets.ValidTopicName(false, []byte(req.TopicName)) {
 		return nil, ErrInvalidArgument("topic_name", "")
 	}
 	if req.Qos > uint32(packets.Qos2) {
diff --git a/plugin/admin/publish_test.go b/plugin/admin/publish_test.go
index a5d6f8de..495da642 100644
--- a/plugin/admin/publish_test.go
+++ b/plugin/admin/publish_test.go
@@ -72,7 +72,7 @@ func TestPublisher_Publish_InvalidArgument(t *testing.T) {
 			name:  "invalid_topic_name",
 			field: "topic_name",
 			req: &PublishRequest{
-				TopicName: "$share/a",
+				TopicName: "/a/b/+",
 				Qos:       2,
 			},
 		},