Due to the characteristics of the structure of hydrogen fuel cell, the output voltage of hydrogen fuel cell is low and unstable, and the output power fluctuates greatly. In order to supply power to the back circuit and load stably and efficiently, the output voltage of hydrogen fuel cell must be transformed and stabilized by DC-DC converter. Therefore, the selection of efficient and stable DC-DC converter has important practical application value for improving the output power characteristics of hydrogen fuel cell and improving the utilization of the output power of hydrogen fuel cell.