Abstract: Serving the people heart and soul,adhering to and safeguarding the people interests,regarding the people's fundamental interests as the starting point and purpose of pondering and solving problems,these are the supreme purposes of the proletarian party.Following the historical path of the Chinese revolution and construction,this paper elucidates the different manifestations of the people's fundamental interests under different historical conditions.Only the Communist Party of China consistently represents the fundamental interests of the people and maintains flesh-and-blood ties with the people.It also proves that our party always puts in the first place the long-term fundamental interests of the people when formulating the routes,guiding principles and policies of revolution and construction.