| This article is based on the technical statistical indicators of the top 30 domestic players and foreign players in the CBA regular season efficiency value in the 2020-2021 season.Mainly using the literature data method,mathematical statistics method,video observation method,rank sum ratio comprehensive evaluation method,the basic situation of domestic players and foreign players in the 2020-2021 CBA regular season is compared.When there is no difference in the Lai index and the playing time is more than that of foreign players,the efficiency value is lower than that of foreign players.At the same time,the relevant offensive and defensive indicators are further selected for comparison,and it is found that there is a gap between domestic players and foreign players in terms of offensive and defensive capabilities.Through the comprehensive evaluation method of rank sum ratio,each player’s competitive offensive and defensive strength in the regular season is graded and comprehensively evaluated and analyzed.propose corresponding countermeasures.The results of the study are as follows:1.The age and efficiency values of domestic players are lower than those of foreign players,with very significant differences（P<0.01）,and the playing time is more than foreign players,with significant differences（P<0.05）.There is no significant difference between the index and foreign players（P>0.05）.2.The offensive abilities of domestic players and foreign players are in the three levels of B,C and D.There are 1 domestic players at the B level,18 at the C level,and 11 at the D level;16 foreign players are at the B level.11 at C level and 3 at D level.Domestic players are lower than foreign players in the four indicators of average points per game,two-point shots,three-point shots,and free throws.Significant difference（P<0.05）.3.Domestic players and foreign players have three levels of defensive ability: B,C,and D.Domestic players are at the B level,3 are at the C level,19 are at the C level,and 8 are at the D level;14 foreign players are at the B level.There are 11 people at C level and 5 people at D level.There is no significant difference between domestic players and foreign players in the three indicators of defensive rebounds,steals and blocks（P>0.05）,but they are inferior to foreign players in foul control ability（P<0.05）.4.The comprehensive offensive and defensive abilities of domestic players are in the four levels of B,C,D,and E,with 3 at the B level,9 at the C level,14 at the D level,and 4 at the E level;foreign players have comprehensive offensive and defensive abilities.There are five levels of A,B,C,D,and E.There are 9 people at the A level,11 people at the B level,7 people at the C level,1 person at the D level,and 2 people at the E level;they are offensive and defensive balance type There are 15 domestic players and 12 foreign players;5 domestic players and 12 foreign players who are weak in attack and defense;10 domestic players and 5foreign players who are weak in defense.The research conclusions are as follows:1.Under the condition that there is no difference in height,weight and Quetole index,and the playing time of domestic players is more than that of foreign players,the efficiency value is lower than that of foreign players,reflecting that the offensive and defensive ability of domestic players is not as good as that of foreign players.2.The overall offensive ability of domestic players is lower than that of foreign players.The main difference is reflected in the number of shots and average points per game,but domestic players are better in three aspects: two-point shooting percentage,offensive rebounding and error control.3.The overall defensive ability of domestic players is not as good as that of foreign players,which is mainly reflected in the large gap between foreign players and foreign players in foul control ability.4.The overall offensive and defensive capabilities of domestic players are at the lower-middle level,while the overall offensive and defensive capabilities of foreign players are at an upper-middle level.Although domestic players can focus on offense-defense balance,their offensive capabilities are insufficient,which ultimately leads to a low level of comprehensive offensive and defensive capabilities. |
