Based on the theory of "Sports Learning Process",this paper explores the notion of "racket pole-forearm angle",and further studies changing laws of chop "racket pole-forearm angle",designs a single and practical teachi.

The article is to analyse the swaying actions of the arm not holding the bat in the technology of push and pull in Pingpong by using the principles of biomechanics and anthropotomy,and elaborate the significance in enhancing the swaying speed of forehand and backhand which is caused by the correct swaying of the arm not holding the bat in Ping-Pong.

On the effects of head and free arm in the stroke of tennis;

By means of lens,language,edit,sound,details,rhythm,mood,shooting angle,structure arrangement and the cooperation of sound,light and colour,the author demonstrates the self-view of the object being shot to the audience in this article.

The paper discusses the influence of the direction and strength of force,the angles of the bat and spinning on the ball s flying curve.

According to the rotating law and characteristics of loop drive and using the principles of mechanics,the bat angles and actions of the wrist shake grip bat when beating loop drive in fast driving are analysed and discussed, thus the technique and its principles in beating loop drive are furtherly made clear to readers.