As an important part of microgrid, bidirectional DC-DC converter can realize the energy flow among various micro sources. However, current sharing problem exists when the converter is operated in parallel. In order to improve the anti-disturbance ability and current sharing control effect of bidirectional DC-DC converter, based on the mathematical model of bidirectional DC-DC converter, a voltage-current double-closed-loop active disturbance rejection control (ADRC) strategy is designed. Considering the current sharing characteristic of parallel operation of bidirectional DC-DC converter, an ADRC current sharing control algorithm for DC-DC converter is proposed by combining ADRC and intermediate current sharing control. The simulation results show that the proposed control system has better rapidity, robustness and adaptability than the traditional PI control system.