Li Dazhao proposed a unique populist ideology under the international background of the Oc-tober Revolution in Russia and the domestic background of the May Fourth Movement in China,based on a combination of theoretical and practical innovation.The core essence of this ideology includes"populism is the translation of Democracy","Democritus and socialism are also spiritually the same",and proletarian dictatorship is the realization of"pure populism".It inherits and develops the materialist historical view of Marxism,promotes the deep development of Marxism in China,and points out the bright prospects for the development of democratic politics in China.