Abstract: This paper tries to explore the predicament of sports and health curriculum reform implementation of internal mechanism from the cause of the path dependence of institutional change by using the method of literature review and logic analysis. The study suggests that physical education curriculum system changing is a procedure of the new-old curriculum system replacement and vicissitude of its rules system and functions, and the conversion process of curriculum system in the process of change also presents the characteristics of path dependence. Organization domaining strategy choice of subjects to the "Nash equilibrium", the new-old course system of choice preference, the low cost of informal rules transformation difficulty, the containment of vested interests are the path dependence of sports curriculum system vicissitude in the conversion. Hence, it puts forward the path dependence of the breakthrough strategy in the process of institutional change, in another words, it must perfect the system of physical education and health course system with the idea on the supply-side reform; to optimize a good supportive environment, to reduce the adaptive expectations for changing of the resistance; to strengthen supervision and accountability mechanism, to achieve the effective control of the curriculum reform implementation; to improve the bottom-up interest expression mechanism; to deal with the relationship between empowerment and energization, and to further enhance the curriculum awareness and abilities of those physical education teachers.