Hydrogen filling system for liquid hydrogen storage and transportation type hydrogen refueling station

The invention discloses a hydrogen filling system for a liquid hydrogen storage and transportation type hydrogen refueling station. The hydrogen filling system comprises a liquid hydrogen storage tank, a high-pressure plunger pump, an air temperature type vaporizer, a high-pressure bottle group, a hydrogen refueling machine and a double-pipe heat exchanger, wherein a water inlet of the double-pipe heat exchanger is connected with a water outlet of a circulating pump through a pipeline, and a water inlet of the circulating pump is connected with an outlet of a water tank through a pipeline; an inlet of the water tank is connected with a water outlet of the double-pipe heat exchanger through a pipeline, the high-pressure plunger pump is connected with the air temperature type vaporizer through a first pipeline and a second pipeline, a stop valve and a check valve are arranged on the first pipeline, the first pipeline penetrates through a closed box, the closed box is located between the stop valve and the check