By using documentary，questionnaire and mathematical statistics method，the sampling survey and statistical analysis are conducted on the teenager students participating in football games of a part of primary schools，junior schools and senior schools in such five districts as Nanan District，Banan District，Jiangbei District，Yubei District and Jiulongpo District of Chongqing，the difference in the motivation participating in campus football games by the teenager students of different grades and genders is derived. The results show that the students from primary schools pay more attention to interests and hobby，that the students from junior schools pay more attention to the development of friendship，and the students from senior schools pay more attention to the release of pressure. There is significant difference in such two dimensions as fitness and pressure release between male and female students in primary school group，and the male students are stronger than female students. There is significant difference in such two dimensions as selfvalue and family support between male students and female students of junior school group，and the male students are stronger than female students. There is no significant difference in all dimensions between male students and female students of senior school group.