1. using inert gas isolate air, greatly inhibiting the growth and reproduction of bacteria, fungi and other microorganisms, oxidation and corrosion of the slow food, prolong the storage time; 2. inflatable packaging foods could very well prevent extrusion, avoiding food break, bond, maintain food appearance, shape and so on. 3. atmosphere-free acid, no temperature, radiation-free, do not add any preservatives, safety and environmental protection.