Abstract: Aiming at the problem of coordinating operation of distributed hybrid energy storage system（HESS）in the isolated DC microgrid,a power coordinating control strategy based on finite control set-model predictive control（FCS-MPC）is proposeed. This strategy uses wavelet packet transform to decompose the power demand of distributed HESS,and due to the characteristics of the decomposed signal and the difference in the initial state of the battery in distributed HESS, so the adaptive factor pair is designed based on the state of charge（SOC） of the battery to further decompose the lowest frequency signal after decomposition. Due to the small number of switching state combinations of DC/DC converters,the rolling optimization calculation of multi-step FCS-MPC is less,so FCS-MPC is used to replace the dual closed-loop PI control to improve the dynamic response of the system. In this paper,an islanded DC microgrid model containing distributed HESS is constructed,and the simulation comparison of the three schemes is made,which verifies that the strategy effectively smooths the DC bus fluctuation and realizes the consistency of battery SOC. This strategy is conducive to improving the stability of grid operation and extending the service life of the battery.