The power balance of DC microgrid is important guarantee for the safe and stable operation of power network. According to the working operation of DC microgrid and capacity of the converters, we divide the operation of DC microgrid into five modes, namely grid-connected operation, current-limited operation, short-time failure operation, islanded load-off operation and islanded power-down operation. The proposed power coordinated control strategy can automatically coordinate the working operation of each converter according to the DC voltage variation, the state of charge of battery and the current of grid connected converter. Then, the active power within DC microgrid under any working condition can be balanced to maintain the voltage stability of DC bus. Finally, the simulation experiments are carried out in the MATLAB/Simulink simulation platform to verify the effectiveness and feasibility of the proposed power coordinated control method.