A liquid hydrogen tank is specifically used for storing liquid hydrogen, with optimized structural design to minimize losses during storage and transfer of liquid hydrogen/liquid helium. It mainly consists of inner and outer containers, filling and draining pipelines, sampling pipelines, liquid discharge and pressure relief pipelines, self-pressurization pipelines, safety release pipelines, venting pipelines, external gas supply pipelines, and level gauge pipelines. Multiple layers of insulation wrapped around the outer container significantly reduce radiative heat loss.