Objective Analyzing program was designed to get some important parameters in Javelin throwing process. Methods The human body was simplified as a multi rigid body system composed of fifteen rigid bodies; the Javelin throwing process of the athlete was photographed by high-speed photography. Results A series of images in the final thrust phase were obtained, and stick figure of human body and the parameters of joints were given (including velocity, accelerator, and the position of center mass, etc.). Conclusions By this program, the prescribed purpose was realized, and the throwing parameters of Javelin thrower's joints were obtained through the analyzing.