Abstract: Based on the middle-level theory, the integrity, self-consistency and practical guidance in school physical education theoretical system are analyzed and also compared with the theoritical connstruction of sport culture theory in schools of Japan. It holds that the weakness of middle-level theoretical research on school physical education leads to the problems of "hollowing out" of school physical education theoretical system, "misreading" of guiding ideology and "chaos" in curriculum reform practice. In order to realize the goal of "creating national sports culture", the sports culture theory, which is composed of a series of supporting theories, including sports skills teaching system, group learning and physical education curriculum content and teaching material compilation, not only promotes the development of theory and practice of school physical education, but also provides a successful model for the middle-level theory research of school physical education. Hence it holds that a complete theoretical system of school physical education should be a network structure consisting of three levels:"macro-thoughts-middle-level theories-practical methods". The middle-level theory of school physical education, as the linkage of the macroscopic guiding ideology and the concrete teaching practice, is the manifestation of the realization mechanism of a school physical education thought, and the basis of guiding the construction of the content and method of school physical education practice.Therefore the middle-level theory of school physical education construction helps various schools to better understand the formation of the thought on physical education in its historical background, connotaton, realization machanism and practice method.