since there is no need to consider reactive power and phase and is more friendly to renewable energy power generation, there are more and more researches on DC microgrids in recent years. But the inertia of DC microgrid is small. When the system is disturbed by external factors, the DC bus voltage is less robust, and it even affects the stable operation of the system. In order to solve this problem, an adaptive inertia damping control strategy for DC microgrid energy storage system is proposed, and the characteristics of flexible and adjustable virtual parameters are fully utilized. The energy storage system can provide inertia to the microgrid, and the small signal model of the system is established, and the stability of the system is analyzed by the Middlebrook criterion. Finally, the effectiveness of the proposed control strategy is verified by Simulink simulation.