Abstract: This article discussed how to understand the importance of the reunification realization of the motherland deeply under the guidance of the important thought of ‘Three Represents’. To realize the reunification of the motherland, to create essential external condition for economic development, to offer new motive force and source for the modernization of both sides of the straits are the realistic demand that the Communist Party of China represents for the development of advanced productivity all the time. Also to realize the reunification the inevitable request for new socialism culture with Chinese characteristics is sacred historical mission on behalf of the fundamental interests of the broad masses of China and the Chinese nation's great rejuvenation realization all the time.