The invention discloses a bidirectional DC/DC converter and a control method thereof. The converter includes a front-stage converter and a post-stage converter which are interleaved and connected in parallel. The front-stage converter runs in an interleaved manner and at a fixed frequency, and the post-stage converter runs in an interleaved voltage and current double closed loop manner. The methodincludes the following steps: during forward/backward running, the post-stage converter generates a current instruction through an outer voltage loop under control; a detected inductive current is compared with the current instruction; and the duty cycle of multiple converters in the post-stage converter is adjusted to make the currents of the multiple converters identical, and thus, the output/input voltages of multiple converters in the front-stage converter are different. By using the bidirectional DC/DC converter and the control method thereof provided by the invention, the advantages oflow soft switching loss of LLC converters and small output current ripple of interleaved converters can be brought into play, and the problem of uneven current caused by inconsistent parameters of LLCconverters connected in parallel can be avoided.