Abstract: This essay, from the perspective of socialist democracy, analyzes the relationship between the socialist democracy and inner-party democracy. It proves that the inner-party democracy is the life of the party and the leading role in people's democracy. Developing the inner-party democracy is not only the logical premise of developing the socialist democracy, but also the essential requirements for the development of our party itself. The inner-party democracy is the core and soul of the people's democracy. Developing the inner-party democracy can mobilize the initiative and creativity of the whole party.