Deng Xiaoping made his own contribution both theoretically and practically to collectivist principles based upon the collectivist idea of Marxism. The contribution is reflected from three aspects: first, the collectivist principles were defended when we counterattacked the “left” as well as the right deviations; secondly, the ideological content of collectivism has been both enriched and developed; thirdly, collectivism is put into effect on the basis of highly-developed social productivity of socialism.