diff --git a/src/server/db/Redis.go b/src/server/db/Redis.go
index b2b79719..31b9eea9 100644
--- a/src/server/db/Redis.go
+++ b/src/server/db/Redis.go
@@ -194,6 +194,20 @@ func RedisZAdd(key string, member string, score float64) {
 	err := RdbWrite.ZAdd(ctx, key, redis.Z{Score: score, Member: member}).Err()
 	if err != nil {
 		log.Debug("redis zadd failed, err:%v\n", err)
+		return
+	}
+	const maxRankSize int64 = 10000
+	count, err := RdbWrite.ZCard(ctx, key).Result()
+	if err != nil {
+		log.Debug("redis zcard failed, err:%v\n", err)
+		return
+	}
+	if count > maxRankSize {
+		removeCount := count - maxRankSize
+		err = RdbWrite.ZRemRangeByRank(ctx, key, 0, removeCount-1).Err()
+		if err != nil {
+			log.Debug("redis zremrangebyrank failed, err:%v\n", err)
+		}
 	}
 }
 
diff --git a/src/server/test/fix_test.go b/src/server/test/fix_test.go
index 12679938..e59763a0 100644
--- a/src/server/test/fix_test.go
+++ b/src/server/test/fix_test.go
@@ -281,3 +281,7 @@ func TestChampionShipCreateRobot(t *testing.T) {
 	robot := game.CreateRobot(1.0, 1)
 	fmt.Printf("Created Robot: %v\n", robot)
 }
+
+func TestRedisZset(t *testing.T) {
+	db.RedisZAdd("rank_user", "100001", 100)
+}