Abstract: The Party group system of the Communist Party of China is not only an important part of the Party's leadership system,but also an institutional force to promote the modernization of the national governance system and governance capacity.The Party group is an important carrier to exercise leadership over non-Party organizations.Through the integration and absorption of the Party group,the Party's centralized and unified leadership can be realized.In the "block governance structure" of the Party and government with Chinese characteristics,the Party group has realized the institutional advantage of "concentrating efforts to do great things",and also carries the hope of breaking bureaucracy.The leading Party group is an organizational form that correctly handles the relationship between the Party and the government,realizes being in power according to law,and transforms the Party's leading behavior into ruling behavior,so as to achieve the organic unity of adhering to the Party's leadership,the people being the masters of the country and running the country according to law.

Key words: Communist Party of China, Party leading group, Party leading group system, relationship between the Party and the government