The purpose of this paper is to sort out the development of gait analysis, introduce the experimental, simulation methods and the main application areas of gait analysis. The future development direction of gait analysis was forecasted. The main literatures about gait analysis were collected, reviewed, and the main research contents, research methods, research status and main application fields of gait analysis were sorted out. The main research content of gait analysis is the quantitative research on kinematics and kinetic parameters, and their changing laws. Most scholars focus their research on clinical diagnosis and rehabilitation evaluation, research and development of wearable robots and rehabilitation aids, and exploration of scientific training methods in competitive sports. The research methods of gait analysis include experimental research and simulation analysis; The research results of gait analysis can provide guidance for clinical diagnosis, efficacy evaluation and rehabilitation training, provide data support for the development of biped robots, walking aids, rehabilitation aids and artificial joints. In the future, the gait analysis method will be more accurate and the application field will be more extensive.