A coordinated control strategy of a photovoltaic and energy storage battery is proposed for the isolated island operation scenario of building a DC microgrid in Huangshi, Hubei Province. Based on the real-time state of the DC micro grid system, the operation mode of the micro grid is divided according to the DC bus voltage value, and the action threshold of the converter is set. Each converter in the micro grid executes the corresponding control strategy according to the range of the bus voltage to meet the energy balance and voltage stability requirements of the micro grid. Considering the consistency of the battery state in the microgrid, a coordinated control strategy based on State Of Charge (SOC) is proposed for the battery converter. In the process of battery charging and discharging, the power rate is distributed according to the capacity difference between different battery groups to avoid overcharge or overdischarge caused by the same charging and discharging efficiency. Finally, Matlab/Simulink is used to verify the control strategy proposed in this paper. This work is supported by National Natural Science Foundation of China (No. 51877152).