diff --git a/component/signal.go b/component/signal.go
index 23bd86e..a1b28f1 100644
--- a/component/signal.go
+++ b/component/signal.go
@@ -5,6 +5,10 @@ import (
 	"joylink.club/rtsssimulation/component/component_proto"
 )
 
+var SignalTag = ecs.NewTag() //标记一个实体为信号机
+
+//////////////////////////////////////////////////////////////////
+
 // SignalLights 信号机灯位列表
 type SignalLights struct {
 	Lights []*ecs.Entry
diff --git a/entity/signal.go b/entity/signal.go
index 22e41d5..92c1fa5 100644
--- a/entity/signal.go
+++ b/entity/signal.go
@@ -66,7 +66,7 @@ func LoadSignals(w ecs.World) error {
 func newSignalEntity(w ecs.World, uid string, worldData *component.WorldData) *ecs.Entry {
 	entry, ok := worldData.EntityMap[uid]
 	if !ok {
-		entry = w.Entry(w.Create(component.UidType))
+		entry = w.Entry(w.Create(component.UidType, component.SignalTag))
 		component.UidType.SetValue(entry, component.Uid{Id: uid})
 		worldData.EntityMap[uid] = entry
 	}