The liquid hydrogen tank can realize the safe storage of liquid hydrogen in the ship power system using hydrogen as fuel. The liquid hydrogen tank adopts a special and efficient thermal insulation structure design, which can ensure the storage of liquid hydrogen for a long time. The design and manufacture follow the classification society specifications. And obtained the classification society certification, the liquid hydrogen tank is designed and manufactured according to a higher safety level, such as the use of double-wall pipe design, secondary shielding design, etc., even if there is hydrogen leakage, the safety of the gas supply system and the hull can be guaranteed.