The kinematic characteristics and patterns of excellent serve motions are currently a hot topic in research on serve quality in tennis. This study selected 10 male national-level tennis athletes as experimental subjects. Based on research needs, the serve technique was defined and divided into four time points and three stages. The origin of the coordinate system, the initial state of the racket, and the definition of racket rotation were determined at the experimental site. By analyzing the force conditions during tennis movement, the forces influencing the tennis trajectory were identified. Based on the force conditions, the movement process was reconstructed, and a motion equation was established for the tennis movement process, thereby proposing a tennis kinematic model. In the simulation experiments and analysis of the proposed model to the topspin serve action of the tennis ball at different landing points of the research sample, it is found that the ball speed has a great influence on the drag coefficient, and when the tennis ball speed is 40m*s-1, the drag coefficient increases to 0.1347 accordingly.
