This article inspects the question of intermal cultural foundation of Marxism and scientific socialism’s broad extension in the early stage of China from the angle of unification of history,and the question of the relationship between the logic construction and Marxism and Chinese practice.The author thinks the greatest danger to Marxism with Chinese characteristics both in theory and in practice is explaining Marxism and scientific socialism with a cultural mood of small?scale peasant economy.From the cultural layer,it is the cultural mood of small?scale peasant economy that is the cultural and psychological basis of dogmatism and empiricism,which isolate the basic theories of Marxist relationship with Chinese practice.If this cultural mood is not got rid of,Marxism with Chinese characteristics and socialist modernization with Chinese characters will be greatly damaged.