The liquid hydrogen tank can realize long-distance transportation of hydrogen energy. Compared with the high-pressure hydrogen transportation scheme, it has the advantages of safer, more efficient and lower freight. The inner container system of the liquid hydrogen tank is made of special steel for liquid hydrogen and is welded by a special welding process to ensure the long-term operation stability and arrangement of the pressure components at -253 °C; the sandwich system adopts a special high-efficiency thermal insulation design to realize the liquid hydrogen tank. No hydrogen emissions during long-distance transportation.