The invention provides a cryogenic liquid air energy storage system of the air circulating pressure in a low-temperature storage tank. By increasing the pressure of a circulating working medium in a low-temperature cold energy storage link, the heat exchange capacity in the circulating process is improved, the resistance loss of the circulating working medium in the process is reduced, and the heat exchange capacity with a static bed is improved, so that energy consumption of a fan of a circulating system is reduced. Meanwhile, temperature rise of air passing through the fan can be reduced, and the cold energy recovery amount is increased. Accordingly, energy consumption of the energy storage system provided by the embodiment is reduced, and the energy storage capacity is improved.