Facing the energy shortage and environmental constraints,countries all over the world invested in developing new energy.As a kind of new energy,nuclear power is favored gradually by the characteristics of cleanness,safety,low-carbon,economical and highly supplying capability.After Fukushima nuclear accident,the worlds nuclear power industry turned into the low tide,however,China restarted its nuclear power project in November,2012.According to the policies of the development of nuclear power,considering the background of the international low-carbon development and the domestic energy situation,this paper illustrates the necessity and economical viability for China to develop nuclear power,analyses the proper mid-term and long-term scales,and proposes for future development of Chinas nuclear power.