Abstract: When the optical storage microgrid operates independently, the system frequency stability cannot meet the requirements when it is subject to light intensity change or load disturbance. To solve this problem, an improved virtual synchronous generator(VSG) control strategy of optical storage microgrid based on energy storage coordination is proposed. Firstly, the VSG control strategy is improved to eliminate the frequency deviation caused by load disturbance. At the same time, the given reference active power of VSG controller is obtained through coordinated control strategy, and the battery energy storage state of charge(SOC) is adjusted to stabilize the frequency deviation caused by the change of illumination intensity. Secondly, the small signal model of improved VSG control system based on energy storage coordination is established for parameter tuning design. Finally, the system simulation model is established for simulation verification, and the simulation results verify the feasibility of the method.