Abstract: Based on the differentiated and interdisciplinary perspective, the development of school physical education is reviewed from three dimensions: the formation and development path of school physical education, the practical difficulties in its development and the sketch of the disciplinary system construction of sport pedagogy. It is believed that discipline differentiation is the driving force for the formation of school physical education while discipline transplantation is the growth force for its development and discipline crossing the vitality for its innovation. On the other hand, however, some problems have existed in the course of the disciplinary development of school physical education with its parent discipline as well as with other external disciplines, including the loss of discipline attributes, dislocation of transformation, confusion of academic discourse, conflict of research paradigms, absence of theoretical system, and so on. Therefore, the construction of sport pedagogy discipline system with Chinese characteristics will release greater vitality in theory integration, knowledge coupling, practice matching and resource aggregation.