This paper gives out the idea of“Digital China Southern Power Grid”（DCSPG）， along with the two stages it should pass through. Based on its layered architecture， the core components of DCSPG are also given out as follows: the data sharing platform which is based on real time data acquiring and synchronization digital networks， the digitalization of Southern Power Grid which aims at the digitalization of“acquiring， transmitting and using of information”， and the substitution of dispatcher by intelligent system in dispatching， which can in turn equip the power grid with the ability of self-healing. The development of DCSPG can improve the operating and dispatching of power grid greatly， especially in the following three aspects: the essential upgrading in the disaster defending ability， the evident improvement in economical criterions， and massive upgrading of efficient in scientific decision-making.