Abstract: With the gradual increase in the penetration rate of renewable energy sources such as wind and solar and power electronic equipment such as multi-converters in the distribution system ("double high"), power distribution system faces many problems and challenges. New problems such as low inertia and weak damping caused by the uncertainty and volatility of high proportion of renewable energy output and high proportion power electronic equipment embedding together bring new challenges to the safe operation of power distribution system. This paper summarizes the problems faced by the distribution system under the new situation, analyzes the mechanism of these new problems, and discusses the existing solutions based on the influence of "double high" characteristics on the distribution system in different spatial and temporal scale. Finally, the development of a "double high" distribution system is prospected.