Double chamber vacuum packaging machine is featured by automatic processing of vacuuming, sealing, printing, cooling in one operation. It has double vacuum chambers. Operator can prepare bags for next vacuum packing in another chamber when one chamber is packing. Therefore, it has higher efficiency than single chamber machine. It is widely used in vacuum packing for the food, pharmaceutical, aquatic, chemical and electronic industries. Vacuum packing can prevent the products from oxidization and mildew, as well as corrosion and moisture. So it prolongs the life and freshness of the products over a prolonged storage time. Machine fills the bag with some kind of gas, such as nitrogen, after vacuuming the bag. Nitrogen gas helps to have longer freshness time than vacuum state.