By researching on table tennis competition, it is found that paddlers inevitable would apply game theory thoughts in competition process. Utilizing mathematical model method in researching some data in competition, it gets paddlers left serve or right serve influences on score probability, then carries out normal distribution examination on the data, it gets that its P value is conform to variance analysis request, after that make single-factor variance analysis. By researching, it is clear that when making left serve, it can improve score probability, and their left and right serve times have no significant influence.