Cai Xinlin is a 17-year-old professional football player from CHN. At the international level, he represents China U17 Women. He plays primarily as a Defender.

Throughout the FIFA U17 Women's World Cup 2025, Cai Xinlin featured in 4 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.