Journal of Multimedia Processing and Technologies Xiaodan Chen 8 3 2017 http://www.dline.info/jmpt/fulltext/v8n3/jmptv8n3_3.pdf With the rapid development of computer technology, computer simulation technology as the mainstream of the computer industry has been applied in various industries in the world, and virtual reality technology as the mainstream technology of computer simulation technology has been widely used. The computer simulation technology is not only applicable to the transformation planning of the old city to new town in construction industry, city evaluation, arts and other fields, especially under the background of sports power it has also been applied in human motion in sports. In this paper the effective data and the original data are stored in the database, so that sports research staff could compare and decide the relevant parameters conveniently; 3D models of athletes and movement are constructed by MAYA; the motion paths of athletes are planed through algorithm A*; use programming way of JAVA to complete the arrangement of background service data; use Unity-3D technology to show the background data figuratively in a simulation system with 3D model; At the same time, the application of computer simulation technology in the sports of human body has enriched people’s cultural life, so that people can simulate sports at home and realize the sharing of data. This research promotes the development of computer simulation technology, provides a powerful guarantee for the development of modern sports under the background sports power, accelerating the development of sports of our country and the world, which is of great significance on the study of human motion sports.