This work is based on the diversity of cultural and artistic protection and inheritance of applied research, combined with the current mature motion capture technology and attitude estimation technology, and its application in Dunhuang dance teaching. The optical motion capture system is used to obtain the three-dimensional data of professional dancers, record their motion capture path and track data, record the three-dimensional motion coordinates of the marked points according to the limb mechanics analysis data, and save them to establish a complete and precise database of Dunhuang dance motion data. Establish a virtual learning environment, propose a one-to-one "teacher-to-student" avatar learning method, standard action database as a control, use posture analysis technology to participate in the evaluation and strengthening of the key details of dance movements, so as to achieve more accurate and comprehensive teaching. Through such an innovative auxiliary teaching system of Dunhuang dance, which combines posture analysis and motion capture technology, professional dancers and enthusiasts of Dunhuang dance will have a new experience different from the three-dimensional animation display of Dunhuang dance, obtain good learning effect, and put forward a new mode and new idea for the teaching of Dunhuang dance.