 Hydrogen fuel cells are a promising source of clean energy for transportation, but they have limited power density and high costs. To address this issue, hybrid power systems combining hydrogen fuel cells with other power sources such as batteries or supercapacitors have been developed. These systems can increase the power density of hydrogen fuel cells and extend their service life. This paper reviews the existing hybrid power circuit topologies, categorizes the existing technical solutions, and discusses the future prospects of hydrogen fuel cell hybrid power systems. This article was authored by Gwangjin Pan, Yunpeng Bai, Huihui Song, and others.