Abstract: This paper starts from the essence of socialism proposed by Deng Xiaoping, makes a brief analysis of the trend of productive force by referring to Marx's argume nts, and draws the conclusion that the development of socialist productive force can not only create abundant social wealth, but also lay the foundation for the termination of capitalism."The Principles of Three Representations" demands an advanced productive force of the CPC, which can be interpreted as the develop ing demand to laborers of advanced productive force.