内容提要：大同思想是中国传统政治文化中的理想社会观。在中国近代，传统政治文化中的大同思想开始与西方各种社会思潮相结合，形成了各种新的理想社会的模式。李大钊从共产主义理想与儒家理想社会观的内在联系出发，在唯物史观的科学基础之上，从社会发展规律、人类大联合和互助的角度来阐发“大同”，赋予大同思想以崭新的时代内容， 构想出社会主义与人道主义、大同团结与个性解放相统一的理想社会，近而实现了近代大同理想社会从空想到科学的转变，并且对实现“大同景运”的具体途径进行了有益的初步探索。
关键词：李大钊 大同思想 社会理想
Analyzing the Datong Thought of Li da—zhao
Abstract: The datong thought is a social ideal of traditional and political culture in china. In modern history of china, the datong thought has linked to social thought in the west and become many new style of social ideal. Li da-zhao start from the relation of between communism and social ideal of Ru scholars and explain the datong thought in many aspects at the base of materialism. He take shape a new social ideal between socialism and humanitarianism, between great harmony and individual liberation. He finish the transition of the datong thought from phantasy to reality and seek after a approach of realizing this social ideal.