Abstract: With the high proportion of distributed photovoltaic power connections and the increasing electricity demand, the distribution network is facing severe problems such as voltage over-limit and seasonal overloading of distribution transformers, which seriously restrict the efficient utilization of distributed renewable energy and the safe and stable operation of the power grid. Therefore, a distributed energy storage flexible allocation and operation optimization strategy is proposed. Through joint optimization of time and space, it determines the optimal path and capacity for moving battery modules of centralized energy storage stations to distribution substations, and optimizes the daily output plan of energy storage equipment in the substations. At the same time, to take into account the impact of photovoltaic output uncertainty, a distributed robust distributed energy storage flexible allocation optimization model is constructed, which takes into account the robustness and economy of the scheme. The simulation results in the IEEE 33-node example show that the proposed strategy can effectively alleviate voltage over-limit and overloading caused by seasonal load surges, achieve economic allocation of energy storage resources in time and space, and significantly improve the flexibility and power supply quality of the distribution network operation.