In the context of the “double carbon” target and the energy Internet, the development of distributed PV and the upgrading of power distribution systems continue to accelerate. In view of the problems exposed during the transition from traditional passive distribution network to active distribution network, this paper puts forward the optimization strategy and suggestions for the operation mode of distribution network based on the advanced experience of foreign countries and the development trend of new distribution system. It aims to improve the absorption capacity of distributed photovoltaic, promote the economical and efficient operation of the power grid, ensure the safe and reliable electricity consumption of users, and help the construction of a new distribution system.