Sports biomechanics is a multidisciplinary applied discipline that studies the mechanics of human movement and plays a crucial role in scientific research and technological support in competitive sports. This paper reviews the research methods in competitive sports biomechanics and focuses on research progress in the year 2023 in three key areas: improving sports performance, preventing sports injuries, and developing sports equipment. The goal is to provide new insights to further advance the application of sports biomechanics in competitive sports.