Since the foundation of the new China in 1949，the first generation of leading group with Mao Zedong as the core had been exploring the construction of socialism in China and fundamental socialist systems. They put forward the objective to build a great socialist power and the “two steps” development strategy，the economic system reform and the opening-up policy，and a relatively independent and complete industry system and national economy system，all of which were served as ideological guide and practice base of the later construction of socialism with Chinese characteristics since the reform and opening-up policy. In the past 30 years since the reform and opening-up policy，the Party declared the “one central task and two basic points” guideline，designed and improved the “harmonious development of economy，politics，culture and society” general layout of socialist construction，and the achievements were more than obvious. In the past 30 years since reform and opening-up policy，during the process of developing the socialism with Chinese characteristics members of Chinese Communist Party have been accumulating the basic experience of the scientific attitudes toward Marxism，advocating the integration of Marxism and China’s status quo，and persisting the integration of Marxism and people’s welfare.