| In order to fully implement the overall plan for China’s football reform and reach the top of the world in three steps,the national youth team issued the notice of China Football Association on the fourth training of U19 National Men’s football team in 2020 and forming a team to participate in China B League under the background of poor strength in the international arena,The team led by head coach Cheng Yaodong landed in Yunnan and began to play in China B League.In order to explore whether the China B League is suitable for the national youth team exercise,this paper takes the technical data of the national youth team in 2020 and 2021 as the research object,through the methods of literature,expert interview,image observation,comparative analysis and mathematical statistics,from the result data,strength coefficient,attack and defense data,tactical data Through comparative analysis of personal attack and defense data,the following:1.The competition results of the national youth team are significantly related to the strength coefficient.Although the final ranking is 11,the strength coefficient of the national youth team has increased from 1.12 to 1.40,and the strength ranking in China B League has increased from 12 th to 8th.The national youth team is gradually changing from the midstream team to the upstream team.2.The goals of the national youth team are highly correlated with the positive shooting and moderately correlated with the creation of opportunities.Although the offensive ball control rate,the number of passes and the index of passing in 2021 season have increased significantly,the number of goals has only increased slightly.3.The goals conceded by the national youth team are not directly related to that index.Therefore,although the indexes of defensive struggle,steals and tackle in 2021 season are reduced,the number of goals conceded has not increased significantly.4.The most commonly used formation of the national youth team is 4-2-3-1.When using the familiar formation,compared with the strength in 2020,the strength of the team in2021 has been significantly improved.In 2021 season,when using the new formation,the strength of the team decreased significantly.5.The tactical reason for the enhancement of the offensive ability of the national youth team is that the increase of passing and ball control rate increases the number of positional attacks of the national youth team,and the tactical reason for the non decline of the defensive ability of the national youth team is the increase of the success rate of encirclement and grab tactics.6.In terms of personnel changes of the national youth team,the reason why the main players leave the team is to participate in a higher-level League.In terms of personal ability,compared with the top foreign youth players,the forward players have poor ability to grasp opportunities,there are obvious differences in the key ball and interception of midfielders,and there are obvious differences in the clearance and interception of defenders.According to the data comparison,the following suggestions are put forward:1.The opponent has posed a great challenge to the national youth team.It is suggested to continue to participate in the China B League and participate in a higher-level game when the team’s strength is upstream of the China B League.2.The national youth team’s goal at the offensive level is mainly related to shooting right and creating opportunities.It can increase the simulation training of different attack scenes to improve the ability of shooting under pressure.The national youth team will conduct timely video analysis after the game and tell the players better choices to improve the ability of players to create opportunities.3.The goal conceded at the defensive level is related to many factors.Timely analyze after the game,pay attention to details,and strive to improve the team’s defensive ability and reduce the goal conceded.4.In the use of formation,we should strengthen the use and practice of new formation.In this way,we can adopt targeted array in the face of different opponents to improve the overall strength of the team.5.Local tactical training should be strengthened to increase the number and efficiency of rapid counterattack,so as to enhance the offensive ability of the national youth team.In terms of defense,when the opponent is strong,the front court players return to the middle and back court for encirclement and grab,so as to delay the opponent’s attack and obtain the ball right.6.Targeted training for the gap between players in different positions and foreign top players.On the premise of ensuring that players have enough playing time,players are encouraged to stay in a higher-level League. |