The main function of vacuum packaging is to remove oxygen, which is beneficial to prevent food spoilage. The principle is also relatively simple, because the deterioration of food mold is mainly caused by the activity of microorganisms, and the survival of most microorganisms (such as mold and yeast) requires oxygen. Vacuum packaging is the use of this principle to remove oxygen from the inside of the bag and food cells, so that the microorganisms lose their living environment. In addition to inhibiting the growth and reproduction of microorganisms, vacuum deoxidation is another important function to prevent oxidation of foods. Oils and fats contain a large amount of unsaturated fatty acids, which are oxidized by the action of oxygen to make foods taste and deteriorate. It is also necessary to have the functions of anti-stress, gas barrier, and preservation, so as to more effectively maintain the original color, aroma, taste, shape and nutritional value of the food for a long time. When purchasing, the packaging of solid and granules is relatively dry and non-corrosive. It can be made of aluminum alloy, and the package is filled with soup. For materials with high salt and acid content, stainless steel or aluminum-magnesium alloy can be used. . The sealing ring is generally made of silicone rubber and black rubber. A few low-grade products use foam rubber. The silicone rubber has high temperature resistance, corrosion resistance, good sealing performance and long service life. The foam rubber has poor sealing performance, easy to fall off and short service life. Tea vacuum packaging machine is a kind of vacuum packaging machine. However, in the actual application, its application still has very big differences. The vacuum package machine adopts advanced microcomputer controller to drive the stepper motor control bag length and trademark positioning, with stable performance, convenient adjustment and accurate detection. Moreover, the packaging has a unique triangular shape, which is beautiful, stylish and enhances the display effect. However, the general vacuum packaging machine does not have such an effect. In the process of using the vacuum sealing machine, various kinds of food, meat products, seafood, fruits and vegetables, pickles, chilled meat, medical products, hardware components, medical devices, etc. are vacuumed, inflated, and body-fitted. However, in essence, there are still very big differences with the above two devices. The vacuum sealer is mainly to isolate all connections between the product and the outside world. The vacuum packaging machine, and the tea vacuum packaging machine, in the middle of the actual application, mainly use microbes to prevent the oxidation of food. In addition, different products, different effects exist, this is a well-known thing. Therefore, in the process of purchasing these devices, we must pay more attention to this problem.