The sports policy is the life of the sports and the development of sports. Strengthening the research on sports policy changes is helpful to understand the laws of the Chinese sports policy change and provide theoretical basis for China to adjust sports policy. This paper discusses the process of China's sports policy changes, and is divided into six stages. First, the thesis analyzes the four kinds of influence factors of sports policy change: the external environment, policy system, policy attributes, network. Then it explores the mechanism of sports policy change and the power and the laws of the Chinese sports policy change. Finally,through above analysis, it guarantees the adjustment and improvement of China's sports policy guiding ideology,basic principles, ideas, system.