With the rapid development of the new edge discipline sports biomechanics, modelling and simulation of human motion as one of the cutting-edge research topics in sports biomechanics is receiving more and more attention. Based on the establishment of the three-dimensional simulation system model of human knee joint and the analysis of buckling motion, this paper uses the three-dimensional image registration knee joint motion analysis method to carry out the research on knee flexion movement to solve the knee joint injury problem of sprinters. The results showed that medial collateral ligament injury and meniscus injury were more common in all types of knee joint injuries, accounting for 24% respectively 7% and 22.4%. The incidence of lateral collateral ligament injury was relatively small, accounting for only 5.6%. And the research shows that the foot strength curve recognition method based on biomechanics sprinters knee joint simulation model is an advanced and complete strategy to reduce sprinters knee joint injury, and it can achieve better results in sprinters knee joint nursing.

随着新的边缘学科运动生物力学的快速发展，人体运动建模与仿真作为运动生物力学的前沿研究课题之一越来越受到重视。本文在建立人体膝关节三维仿真系统模型和屈曲运动分析的基础上，利用三维图像配准膝关节运动分析方法开展膝关节屈曲运动研究，解决膝关节屈曲运动问题。短跑运动员的关节损伤问题。结果显示，内侧副韧带损伤和半月板损伤在各类膝关节损伤中均较为常见，分别占24%、7%和22.4%。外侧副韧带损伤的发生率相对较小，仅占5.6%。