This study is intended for analysis on the biomechanical parameters variation in the motor processes of horse-vaulting landing to reduce the athlete’s body function damage. Firstly, this paper analyzes the force situation of horse-vaulting landing and its satisfied dynamics equation. Secondly, through advanced measuring instruments and analysis software, we can get the mechanical characteristics of each joint of lower limb in the motor processes of horse-vaulting landing. Finally, take simulation design of different mechanical parameters of cushion to analyze the effect condition of each joint of lower limb. Our paper rejects the traditional research experience, but to use the advanced science and technology to the rational analysis on the horse-vaulting landing and provide some theoretical basis for the training and improvement of horse-vaulting.