Abstract: The 15th Five-Year Plan period is an important link for China to move towards building a socialist modern sports power by 2035, and a crucial stage for further comprehensively deepening sports reform. Judging from the direction of reform, further comprehensively deepening sports reform during the 15th Five-Year Plan period should practice "four important principles", serve the national strategy, adhere to the people's attributes, governance for modernization, and promote openness and diversity. However, in practice, there are still problems including the weak coordination and linkage between the central and local governments and departments, gaps in the "last mile" connection at the grassroots level, poor operation of the sports management system, imbalance between supply and demand of sports products and services, insufficient market-oriented allocation of sports element resources, limited participation of social forces, blocked channels for cultivating sports reserve talents, and low governance efficiency in the sports industry. In the next step of reform, on the basis of handling key relationships, the sports management system and mechanism should be improved; a new national system for competitive sports be built; the public service system for national fitness be well-developed; the grassroots sports governance be innovated; the channels for cultivating sports reserve talents be opened up; the mechanism for social forces to participate in sports be improved; the governance of the sports industry be deepened; and the coordination and linkage be strengthened between the central and local governments and departments. In organizational implementation, it is necessary to strengthen the leadership of the CPC, enhance the planning of the reform system, update the concept of sports development and consolidate the guarantee of the rule of law.