An Analysis on the Characters of Technique and Tactic in "Twenty-one Point" System of Badminton Men's Doubles

To find out the change of the use of the technique and tactic of the badminton men's doubles owing to the "twenty-one point" system,and to provide academic support for the development and improvement of the event in our country,the thesis adopts the methods of documentation,statistics and video statistics to analyze and study 20 international badminton men's doubles matches.In conclusion,in the "twenty-one point" system,the chances and unpredictable factors are increased.The players reduce the utility frequency in the area No.4 and increase the utility frequency of reserve area No.2 and 5.The contest of the front control power became more drastic,and the percentage of volley and smash are both increased.