Abstract: In the Twenty-First Century, socialism with Chinese characteristics needs strong power. Six kinds of power constitute an organic power system as follows. The change of main social contradictions is the new power, reform is the direct power, innovation is the first motive power to the economic development, common prosperity is the pursuit of the people as well as the people’s main power of the development of socialism with Chinese characteristics in the Twenty-First Century, the China dream of the great rejuvenation of the Chinese is the national main power, and a firm lofty ideal of communism is the spiritual power of the Communist Party. The six kinds of power jointly promote the Twenty-First Century Chinese socialism to move forward unceasingly.