With the development of distributed energy and power electronics, the DC power distribution network has been widely concerned, and the coordinated control of the bus voltage is one of the key technologies. In the paper, according to the uncertainty of DG and load, a control strategy for voltage coordinated operation of DC power distribution network is proposed, the main VSC, as the balance node, uses the voltage control mode with margin, and the slave stations uses the droop control mode of the p-v, through coordinated operation, the stations maintain the voltage stability and power balance. Finally, through the simulation of DC distribution network, effectiveness of the control strategy is verified.