The invention discloses a bidirectional DC/DC converter based on serial connection of SiC devices, and belongs to the technical field of electric power and electronics. The bidirectional DC/DC converter disclosed by the invention comprises eight parts, i.e., an input-side filtering capacitor, an inversion full bridge, a transmission inductor, an input-side blocking capacitor, a transformer, an output-side blocking capacitor, a rectification full bridge, an output-side filtering capacitor and the like. Electronic switches of each leg of the inversion full bridge and the rectification full bridge employ an SiC device serial connection mode so that the voltage grade and the transmission power can be improved, at the same time, the work efficiency is improved, and the overall dimension is reduced. The invention further discloses a control system of a high-voltage large-power bidirectional DC/DC converter based on serial connection of SiC devices. The system mainly comprises a master control unit, a signal generation unit, a driving unit and a sampling protection unit.