The invention relates to a current-sharing control method of a bidirectional variable flow type feedback device and a traction rectifier. The method comprises following steps: 1), obtaining the open circuit voltage value and the equivalent internal resistance of the traction rectifier, thus obtaining the relation of the voltage and the current of the traction rectifier; 2), setting an open circuit voltage value for the bidirectional variable flow type feedback device according to the open circuit voltage value of the traction rectifier; 3), setting the droop coefficient of the bidirectional variable flow type feedback device according to the equivalent internal resistance of the traction rectifier, enabling the equivalent internal resistance of the bidirectional variable flow type feedback device to be always equal to that of the traction rectifier; 4), supplying power for traction of a terrain locomotive by the bidirectional variable flow type feedback device according to the set open circuit voltage value and the droop coefficient. The method realizes current-sharing control of the bidirectional variable flow type feedback device and the traction rectifier through the control algorithm of the software without changing the hardware and increasing extra cost, and improves the service life of the bidirectional variable flow type feedback device and the traction rectifier.