|（School of Physical Education，Shaanxi Normal University，Xi’an 710062，China）
Abstract: Having studied the offense and defense capacities of teams in CBA game season 2010-2011, the author found that teams with good tournament performances had a more powerful and balanced offense and defense capac-ity. According to the best classification rule, coupled with a rational classification datasheet, the structure of compe-tition in professional CBA tournament can be divided into 3 classes. High performance teams had distinct advan-tages in terms of offense indexes (score, 2-point rate, 3-point rate, free throw rate, offensive rebound, assistant of-fense) and defense indexes (points lost, steals, fouls, block shots). There was a significant or extremely significant difference between teams in different classes, while the teams in the games had a roughly identical error rate, and no significant difference in terms of offensive rebound. The comprehensive evaluation and structure classification of professional basketball clubs by applying TOPSIS and RSR methods are provided with certain reliability and a ref-erence value.
Key words: training and competition；CBA；professional club；offense and defense capacity；structure of com-petition