Based on the analysis of the reasons the voltage deviation of the conventional Three-level DC/DC multi-module parallel current-sharing method is large and the power of each parallel module is not power-sharing, study on adaptive droop of parallel current-sharing method for Three-level DC/DC is proposed. By collecting the voltage and current of each parallel converter in real time, the mathematical model between the droop coefficient of the converter and the load power is established, and the droop coefficient is adjusted adaptively to make the DC bus voltage follow the given value. Build simulation model of DC micro power grid under the same conditions using MATLAB/Simulink software platform, the simulation analysis of traditional drooping droop control and adaptive control method of Three-level DC/DC module in parallel DC bus voltage drop and power allocation were analyzed, verified the sagging adaptive control method is used for more than Three-level DC/DC module in parallel, to realize the different between the Three-level DC/DC converter power rating “power-sharing”, at the same time greatly improve the voltage drop caused by the line impedance, enhances the power quality of DC bus.