Abstract: Low-voltage distribution area interconnected by flexible DC technology is an effective means to realize dynamic capacity expansion and rapid transmission of power restoration, and improve the reliability of power supply and the ability to accept the distributed power. In long term, the flexible network of low-voltage hybrid AC and DC power system can be used to adapt to large-scale multi-mode sources and loads access, and achieve the goal of flexible and efficient interaction between the source network and the load storage. The paper proposed typical scenarios suitable for flexible interconnection of power distribution area, including large-scale distributed power access, terminal electrification rate increase, new infrastructure construction requirements and seasonal load fluctuations. The latest progress of key technologies were summarized from five aspects of planning and construction, interconnection topologies and grid structure design, key equipment, operation control and rapid relay protection. Combined with operation control, a primary construction plan and a secondary IoT architecture for the flexible interconnection system were proposed. On the basis, the advanced application and future development mode of the flexible interconnection system in the distribution station area were prospected.