Li Dayin (Chinese: 李大银; pinyin: Lǐ Dàyín; born 12 February 1998) is a Chinese weightlifter, World Champion and Asian Champion currently competing in the 89 kg division.

He won the gold medal in the men's 81 kg event at the 2022 World Weightlifting Championships held in Bogotá, Colombia.

[4] In 2018 the International Weightlifting Federation updated the weight classes, and he competed in the newly created 81 kg division as the 2018 World Championships.

In the clean & jerk portion of the competition he exchanged junior world records with Harrison Maurus, his final gold medal winning lift of 204 kg secured him the bronze medal in the total and junior world records in all lifts.

[6][7][8] He competed at the 2019 IWF World Cup (a qualifying event for the 2020 Summer Olympics) held in Fuzhou.