讲述了基于人体关节点的步态识别技术。步态识别是指根据人走路的姿势及动力学特征来识别人的身份，包括人体运动目标检测、特征提取和分类识别三个过程。本文在对各种步态识别算法进行了详细研究的基础上，对核心环节暨特征提取过程进行了主要研究，提出了相应的新的改进算法。-Gait recognition is defined to identify the identity of the person as the way peoplewalk　and　kinetic　characteristics.It　includes　moving　target　detection,featureextraction ,classification and recognition.Based on the study of the various of gaitrecognition algorithms, main research about the key stage- feature extraction has beendone and a new algorithm has been proposed in this paper.