Abstract: Depending on the methods of questionnaire, interview, mathematical statistics, this paper makes a study of the mode of adolescents sports and health education in Xi'an, with the result showing that the of theoretical assumption structure of the "trinity"mode of school, family and community fits the reality investigation data much better. The interrelatedness between school education and home education is the highest, reaching 0.75. The interrelatedness between home education and community education is 0.69 while the interrelatedness between school and community education is 0.61. The development of school education is the best and the development of community one is the worst among these three kinds of education. Among elementary school pupils of four grades, those in the third grade come up with the best evaluation, the higher the grade, the lower the score.in appraise the physical and health education best in four grades. The research provides not only new paths for the evaluation of adolescents' sports and health levels in Xian or even the whole country, but also theoretical references for the construction and optimization of the trinity mode of sports and health education.

Key words: adolescent, trinity, sports and health education, structural mode, factor analysis