Self-pressurized series liquid nitrogen replenishment tank is used for transportation and storage of low-temperature liquid nitrogen. It is a high-performance low-temperature liquid nitrogen medium storage container. Internally stored liquid nitrogen is drained. Self-pressurization series liquid nitrogen tanks are composed of control structure and tank body. All models in this series are equipped with four mobile swivel casters, which facilitate the use and movement of containers in different locations. At present, it is widely used in mold industry, animal husbandry, medicine, semiconductor, food, aerospace, military and low temperature chemical industries and fields.