Xiao Ruoteng (simplified Chinese: 肖若腾; traditional Chinese: 肖若騰; pinyin: Xiào Ruòténg, born 30 January 1996) is a Chinese artistic gymnast. He competed at the 2020 and 2024 Olympic Games, winning five medals. He is the 2017 World all-around champion and the 2018 World pommel horse champion. As a member of the Chinese team, he is a 2018 World champion and a two-time Asian Games champion (2018, 2022). He is also the 2017 Asian all-around and pommel horse champion.

Xiao was born on 30 January 1996 in Beijing. His parents signed him up for gymnastics at age five because he was an active child.

Xiao won gold medals on the pommel horse and the horizontal bar at the 2015 São Paulo World Cup. He then competed at the Asian Championships in Hiroshima and helped the Chinese team win silver behind Japan. Individually, he won a silver medal on the pommel horse behind Kazuma Kaya. He was then selected to compete at the World Championships in Glasgow alongside Deng Shudi, Lin Chaopan, Liu Yang, You Hao, and Zhang Chenglong. The team won the bronze medal behind Japan and Great Britain after Xiao fell off the pommel horse. This marked the first time since 2003 that the Chinese team did not win the gold medal at the World Championships. Xiao qualified for the individual all-around final, where he finished in ninth place.

Xiao injured his elbow during training and was unable to compete in the 2016 Olympic Games. He considered retirement due to the injury but decided to continue competing.

Xiao returned to competition and won the gold medal on the horizontal bar at the Doha World Cup, and he won a silver medal on the pommel horse behind Krisztián Berki. He then competed at the Asian Championships in Bangkok and led his team to the gold medal. He also won the gold medal in the all-around and on the pommel horse, and he won silver medals on the floor exercise and horizontal bar. He then competed at the World Championships in Montreal and won the all-around title. He became the first Chinese gymnast to win a major all-around title since Yang Wei won at the 2008 Summer Olympics. He also won a bronze medal in the pommel horse final behind Max Whitlock and David Belyavskiy.

Xiao won a silver medal on the parallel bars at the Doha World Cup behind teammate Zou Jingyuan. He then competed at the Chinese Championships and won the all-around title by over two points ahead of Sun Wei. He also won a bronze medal with his provincial team and on the horizontal bar. He represented China at the 2018 Asian Games alongside Zou, Sun, Deng Shudi, and Lin Chaopan, and they won the team title. Individually, he won the all-around bronze medal behind Lin and Shogo Nonomura after falling off the pommel horse. Then in the event finals, he won a silver medal on the parallel bars and a bronze medal on the horizontal bar.

Xiao was selected to compete at the World Championships in Doha with the same team that competed at the Asian Games. The team finished second to Russia in the qualification round due to multiple falls on the pommel horse, and Xiao qualified in first place for the all-around final. The team defeated Russia by only 0.049 in the team final to win China's first World team gold medal since 2014. In the all-around final Xiao and Artur Dalaloyan tied with the highest score of 87.598. However, the tie-breaker procedure of counting the five highest apparatus scores resulted in Dalaloyan winning the gold medal. Then in the pommel horse final, he tied with Max Whitlock for the highest score, but Xiao won the highest execution score tie-breaker.

Xiao finished seventh on the floor exercise at the 2019 Doha World Cup. Then at the Chinese Championships, he won the gold medal on the floor exercise and the silver medal on the pommel horse. He then competed at the World Championships in Stuttgart alongside Deng Shudi, Lin Chaopan, Sun Wei, and Zou Jingyuan. The team trailed Russia in the qualification round, and Xiao qualified third into the all-around final behind Russians Nikita Nagornyy and Artur Dalaloyan. The Chinese team won the silver medal in the team final by one point behind Russia. In the all-around final, Xiao fell off the horizontal bar, resulting in a fourth-place finish by 0.283 behind the bronze medalist. He then won a bronze medal in the floor exercise final behind Carlos Yulo and Artem Dolgopyat.