Abstract: In order to building a robust smart grid with Chinese characteristics, the distribution smart grid issue is studied. Some present questions hindering the futuristic development of electric power distribution are put forward. The definition of smart distribution grid is given. The detailed characteristics are analyzed, several functional requirements are proposed, and the development in the corresponding field is reviewed.The key technologies deployed for the realization of the smart distribution grid are explored in depth, which would give referrence for the further research and implementation of distribution networks intellectualization in the future.