diff --git a/game/builtin/ranking_list.go b/game/builtin/ranking_list.go
index dcf0b38..18ddfca 100644
--- a/game/builtin/ranking_list.go
+++ b/game/builtin/ranking_list.go
@@ -50,6 +50,13 @@ func (slf *RankingList[CompetitorID, Score]) Competitor(competitorId CompetitorI
 		} else {
 			slf.competitor(competitorId, score, rank, len(slf.scores)-1)
 		}
+		if len(slf.rankChangeEventHandles) > 0 {
+			newRank, err := slf.GetRank(competitorId)
+			if err != nil {
+				panic(err)
+			}
+			slf.OnRankChangeEvent(competitorId, rank, newRank, v, score)
+		}
 	} else {
 		if slf.rankCount > 0 && len(slf.scores) >= slf.rankCount {
 			last := slf.scores[len(slf.scores)-1]
@@ -58,6 +65,13 @@ func (slf *RankingList[CompetitorID, Score]) Competitor(competitorId CompetitorI
 			}
 		}
 		slf.competitor(competitorId, score, 0, len(slf.scores)-1)
+		if len(slf.rankChangeEventHandles) > 0 {
+			newRank, err := slf.GetRank(competitorId)
+			if err != nil {
+				panic(err)
+			}
+			slf.OnRankChangeEvent(competitorId, newRank, newRank, score, score)
+		}
 	}
 }
 
diff --git a/game/ranking_list.go b/game/ranking_list.go
index 3841567..7821348 100644
--- a/game/ranking_list.go
+++ b/game/ranking_list.go
@@ -29,6 +29,7 @@ type RankingList[CompetitorID comparable, Score generic.Ordered] interface {
 	Clear()
 
 	// RegRankChangeEvent 排名改变时将立即执行注册的事件处理函数
+	//  - 当竞争者为新加入时，oldRank 和 oldScore 均与 newRank 和 newScore 相同
 	RegRankChangeEvent(handle RankChangeEventHandle[CompetitorID, Score])
 	OnRankChangeEvent(competitorId CompetitorID, oldRank, newRank int, oldScore, newScore Score)
 }