With the continuous development of science and technology, cryogenic storage technology is increasingly used in many fields such as biomedicine, scientific research experiments and industry. Among them, liquid nitrogen supply tanks are widely used in these fields because of their more durable and stable low temperature conditions than traditional liquid nitrogen containers. Liquid nitrogen supply tanks are mainly used to store liquid nitrogen and replenish liquid nitrogen for normal pressure liquid nitrogen tanks, gas phase liquid nitrogen tanks, etc. 1. Double safety protection measures: equipped with double safety automatic control valves to control the inner tank pressure below 0.1mpa, providing double protection to ensure safe use. 2. Continuous pressurization and drainage: It has the uninterrupted nature of continuous pressurization and continuous drainage to improve the liquid supply efficiency. 3. Convenient to move: It is equipped with high-load-bearing mobile casters for quick movement. 4. Easy to operate: Special ultra-low temperature inlet and outlet valves, booster valves, drain valves, etc. are easier to operate, durable, and beautiful. 5. Durable material: The outer shell and the inner tank are made of 304 stainless steel, with good vacuum and low temperature performance. Liquid nitrogen supply tanks have become one of the preferred equipment for liquid nitrogen storage through their unique design and wide range of applications. It not only meets special needs, ensures the stability of liquid nitrogen delivery, and ensures the normal operation of equipment, but also has a wide range of applications in scientific research, medical and agricultural fields, providing a better freezing environment and ensuring the survival and quality of frozen samples.