The vacuum packaging machine vacuum-packs sausages, meat products, biscuits and other foods. The packaged food can prevent mildew, keep the quality and freshness, and prolong the storage period of the product. Just press the vacuum cover to automatically complete the vacuuming and sealing. The main function of vacuum packaging is to remove oxygen to help prevent food spoilage. The principle is also relatively simple, because the mildew and spoilage of food is mainly caused by the activities of microorganisms, and the survival of most microorganisms (such as mold and yeast) requires oxygen. The vacuum packaging uses this principle to extract the oxygen in the packaging bag and food cells, so that the microorganisms lose the environment for survival.