Abstract: Aiming at the difficulty of predicting the energy storage life in the optimal configuration of microgrid, this paper proposes a multi-scenario coordinated optimization method of microgrid considering the multi-factor aggregated energy storage life. The microgrid with distributed generation and storage of new energy is taken as the research object. The life loss of the energy storage system is measured by the investment replacement cost, and an energy storage control strategy is formulated, which takes into account of various economic factors, such as investment construction, operation scheduling and equipment life loss. Based on the objective function of minimizing equal annual investment cost and operation cost, a two-layer optimal allocation model of microgrid capacity is established. In this paper, the particle swarm algorithm is used for simulation verification. It is proved that the proposed model and the energy storage control strategy can effectively prolong the service life of energy storage equipment and improve economy and stability of microgrid operation.