Abstract: In recent years, extreme disasters have occurred frequently, causing major power outages in the power system, greatly affecting power supply reliability. It is urgent to coordinate multiple distributed power sources and energy storage to quickly restore loads and improve system reliability. In view of the scenario of large-scale power outages in the distribution network caused by typhoon disasters, a two-stage distribution network reliability improvement strategy considering the feasibility of establishing microgrid islands is proposed, taking into account the risk of pole collapse and line breakage, and supporting the distribution network through microgrids and mobile energy storage to improve the reliability of the distribution network. At the same time, load loss and outage time are considered. With the goal of minimizing the total power loss of the system, firstly, a pre-disaster mobile energy storage pre-configuration model is constructed, considering potential recovery needs and comprehensive mobile energy storage support. This involves pre-layout and network reconstruction of energy storage, supported by microgrids and mobile energy storage, making decisions on the number, location, and network topology of mobile energy storage configurations. During the disaster recovery period, decisions are made on the network topology for different reconstruction phases to improve the reliability of the distribution network at each stage. Finally, numerical simulation is conducted using the improved IEEE 33 node distribution network as an example. The results indicate that the proposed strategy effectively improves system reliability while maintaining good economic efficiency.