Abstract: “What kind of party to build,how to build the party,what kind of socialism to build,how to build socialism,what kind of development to achieve and how to develop” are the basic problems of socialism with Chinese characteristics.The theoretical basis of the basic problems of socialism with Chinese characteristics is Marxism-Leninism.Although Marxism-Leninism does not and cannot answer every major issue of socialist development in todays era,as the guiding ideology of the worlds proletarian party,Marxism-Leninisms relevant theories on the construction of proletarian party,socialist construction and the development of human society undoubtedly provide a theoretical basis for the socialist construction of all countries today,have laid a solid theoretical foundation for the formation and development of the basic problems of socialism with Chinese characteristics,and also provide a theoretical source and action guide for us to scientifically solve the basic problems of socialism with Chinese characteristics today.It is in this sense that Marxism-Leninism is the theoretical source of the fundamental problems of socialism with Chinese characteristics.Todays exploration of the basic problems of socialism with Chinese characteristics is the inheritance and continuation,persistence and development,integrity and innovation of the basic principles of scientific socialism of Marxism-Leninism.

Key words: Marxism, Leninism, socialism with Chinese characteristics, basic issues