diff --git a/engine.go b/engine.go
index f52148aa..f5710801 100644
--- a/engine.go
+++ b/engine.go
@@ -209,6 +209,11 @@ func (engine *Engine) SetColumnMapper(mapper names.Mapper) {
 	engine.tagParser.SetColumnMapper(mapper)
 }
 
+// SetTagIdentifier set the tag identifier
+func (engine *Engine) SetTagIdentifier(tagIdentifier string) {
+	engine.tagParser.SetIdentifier(tagIdentifier)
+}
+
 // Quote Use QuoteStr quote the string sql
 func (engine *Engine) Quote(value string) string {
 	value = strings.TrimSpace(value)
diff --git a/engine_group.go b/engine_group.go
index cdd9dd44..3e91cbd6 100644
--- a/engine_group.go
+++ b/engine_group.go
@@ -167,6 +167,14 @@ func (eg *EngineGroup) SetMapper(mapper names.Mapper) {
 	}
 }
 
+// SetTagIdentifier set the tag identifier
+func (eg *EngineGroup) SetTagIdentifier(tagIdentifier string) {
+	eg.Engine.SetTagIdentifier(tagIdentifier)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].SetTagIdentifier(tagIdentifier)
+	}
+}
+
 // SetMaxIdleConns set the max idle connections on pool, default is 2
 func (eg *EngineGroup) SetMaxIdleConns(conns int) {
 	eg.Engine.DB().SetMaxIdleConns(conns)
diff --git a/interface.go b/interface.go
index 0fe9cbe1..55162c8c 100644
--- a/interface.go
+++ b/interface.go
@@ -101,6 +101,7 @@ type EngineInterface interface {
 	SetCacher(string, caches.Cacher)
 	SetConnMaxLifetime(time.Duration)
 	SetColumnMapper(names.Mapper)
+	SetTagIdentifier(string)
 	SetDefaultCacher(caches.Cacher)
 	SetLogger(logger interface{})
 	SetLogLevel(log.LogLevel)
diff --git a/tags/parser.go b/tags/parser.go
index a301d124..45dd6d9d 100644
--- a/tags/parser.go
+++ b/tags/parser.go
@@ -63,6 +63,11 @@ func (parser *Parser) SetColumnMapper(mapper names.Mapper) {
 	parser.columnMapper = mapper
 }
 
+func (parser *Parser) SetIdentifier(identifier string) {
+	parser.ClearCaches()
+	parser.identifier = identifier
+}
+
 func (parser *Parser) ParseWithCache(v reflect.Value) (*schemas.Table, error) {
 	t := v.Type()
 	tableI, ok := parser.tableCache.Load(t)