diff --git a/mysql/mariadb_gtid.go b/mysql/mariadb_gtid.go
index 9cd32d842..8bfffd092 100644
--- a/mysql/mariadb_gtid.go
+++ b/mysql/mariadb_gtid.go
@@ -113,15 +113,9 @@ func ParseMariadbGTIDSet(str string) (GTIDSet, error) {
 	if str == "" {
 		return s, nil
 	}
-
-	sp := strings.Split(str, ",")
-
-	//todo, handle redundant same uuid
-	for i := 0; i < len(sp); i++ {
-		err := s.Update(sp[i])
-		if err != nil {
-			return nil, errors.Trace(err)
-		}
+	err := s.Update(str)
+	if err != nil {
+		return nil, err
 	}
 	return s, nil
 }
@@ -147,13 +141,19 @@ func (s *MariadbGTIDSet) AddSet(gtid *MariadbGTID) error {
 
 // Update updates mariadb gtid set
 func (s *MariadbGTIDSet) Update(GTIDStr string) error {
-	gtid, err := ParseMariadbGTID(GTIDStr)
-	if err != nil {
-		return err
+	sp := strings.Split(GTIDStr, ",")
+	//todo, handle redundant same uuid
+	for i := 0; i < len(sp); i++ {
+		gtid, err := ParseMariadbGTID(sp[i])
+		if err != nil {
+			return errors.Trace(err)
+		}
+		err = s.AddSet(gtid)
+		if err != nil {
+			return errors.Trace(err)
+		}
 	}
-
-	err = s.AddSet(gtid)
-	return errors.Trace(err)
+	return nil
 }
 
 func (s *MariadbGTIDSet) String() string {
diff --git a/mysql/mariadb_gtid_test.go b/mysql/mariadb_gtid_test.go
index e898bceb2..6d0ce22c3 100644
--- a/mysql/mariadb_gtid_test.go
+++ b/mysql/mariadb_gtid_test.go
@@ -152,6 +152,7 @@ func (t *mariaDBTestSuite) TestMariaDBGTIDSetUpdate(c *check.C) {
 		{false, "1-2-2", map[uint32]string{1: "1-2-2", 2: "2-2-2"}},
 		{false, "1-2-1", map[uint32]string{1: "1-2-1", 2: "2-2-2"}},
 		{false, "3-2-1", map[uint32]string{1: "1-1-1", 2: "2-2-2", 3: "3-2-1"}},
+		{false, "3-2-1,4-2-1", map[uint32]string{1: "1-1-1", 2: "2-2-2", 3: "3-2-1", 4: "4-2-1"}},
 	}
 
 	for _, cs := range cases {
diff --git a/mysql/mysql_gtid.go b/mysql/mysql_gtid.go
index ce43b3129..c3cd48ced 100644
--- a/mysql/mysql_gtid.go
+++ b/mysql/mysql_gtid.go
@@ -363,13 +363,13 @@ func (s *MysqlGTIDSet) AddSet(set *UUIDSet) {
 }
 
 func (s *MysqlGTIDSet) Update(GTIDStr string) error {
-	uuidSet, err := ParseUUIDSet(GTIDStr)
+	gtidSet, err := ParseMysqlGTIDSet(GTIDStr)
 	if err != nil {
 		return err
 	}
-
-	s.AddSet(uuidSet)
-
+	for _, uuidSet := range gtidSet.(*MysqlGTIDSet).Sets {
+		s.AddSet(uuidSet)
+	}
 	return nil
 }
 
diff --git a/mysql/mysql_test.go b/mysql/mysql_test.go
index a80c19de5..2b79349d4 100644
--- a/mysql/mysql_test.go
+++ b/mysql/mysql_test.go
@@ -106,6 +106,29 @@ func (t *mysqlTestSuite) TestMysqlUpdate(c *check.C) {
 	c.Assert(err, check.IsNil)
 
 	c.Assert(strings.ToUpper(g1.String()), check.Equals, "3E11FA47-71CA-11E1-9E33-C80AA9429562:21-58")
+
+	g1, err = ParseMysqlGTIDSet(`
+		519CE70F-A893-11E9-A95A-B32DC65A7026:1-1154661,
+		5C9CA52B-9F11-11E9-8EAF-3381EC1CC790:1-244,
+		802D69FD-A3B6-11E9-B1EA-50BAB55BA838:1-1221371,
+		F2B50559-A891-11E9-B646-884FF0CA2043:1-479261
+	`)
+	c.Assert(err, check.IsNil)
+
+	err = g1.Update(`
+		802D69FD-A3B6-11E9-B1EA-50BAB55BA838:1221110-1221371,
+		F2B50559-A891-11E9-B646-884FF0CA2043:478509-479266
+	`)
+	c.Assert(err, check.IsNil)
+
+	g2, err := ParseMysqlGTIDSet(`
+		519CE70F-A893-11E9-A95A-B32DC65A7026:1-1154661,
+		5C9CA52B-9F11-11E9-8EAF-3381EC1CC790:1-244,
+		802D69FD-A3B6-11E9-B1EA-50BAB55BA838:1-1221371,
+		F2B50559-A891-11E9-B646-884FF0CA2043:1-479266
+	`)
+	c.Assert(err, check.IsNil)
+	c.Assert(g2.Equal(g1), check.IsTrue)
 }
 
 func (t *mysqlTestSuite) TestMysqlGTIDContain(c *check.C) {