Motion capture Instruments was a kind of high technology equipment that was used for measuring accurately the motion condition of moving objects in 3D space. Motion capture Instruments applied in physical training could help coaches observe and monitor the athletes' techniques from different perspectives, and obtain many motion parameters data of specific technical action and physiological and biochemical indexes data, and then statistic the law of motion, so as to provide standard technical guidance for scientific training. The concept of motion capture, the principle of motion capture, the classification and characteristic of motion capture were introduced in the paper.
