From the perspective of maintaining the safe and stable operation of the microgrid and prolonging the service life of the battery, an improved hybrid energy storage control strategy is proposed, which is designed by decomposing the power to be stabilized into three components in the high, middle and low frequency bands, and introducing the feedback of the energy storage system SOC. The hybrid energy storage power distribution strategy reduces the number of charging and discharging of the battery and prolongs its service life. At the same time, it prevents the energy storage system from overcharging / overdischarging, so that the hybrid energy storage can respond stably and safely to the grid energy dispatch. The actual calculation examples and the comparison simulation experiment results prove that: compared with the traditional control strategy, the improved control strategy reduces the charge and discharge times of the battery by 58. 3% under the same working conditions, and can effectively solve the problem that the system cannot operate normally and stably due to the overcharge / overdischarge of the energy storage equipment.