Using methods of documentation, video analysis, and mathematical statistics, this paper makes a statistical analysis on element of difficulty chosen by two groups of athletes: those both participated in Tai Chi in 2013 National Wushu Championship and ranked in top15, and those attended Tai Chi martial arts in the Twelfth National Games. Results show that there are usually 6 elements of difficulty chosen by Tai Chi high-level athletes. Faults in athletes’elements of difficulty focus on 4 moves. The average quality in elements of difficulty completion of high-level male athletes is not necessarily higher than that of the female athlete, and the average quality in Tai Chi elements of difficulty completion is not necessarily higher than Tai Chi sword. Shaking is the main cause of faults of the difficulty action.