The vacuum packaging machine can automatically extract the air in the packaging bag and complete the sealing work after reaching the predetermined vacuum degree. It can also be filled with nitrogen or other mixed gases and then complete the sealing process. The vacuum packaging machine is often used in the food industry because the food can resist oxidation after vacuum packaging, so as to achieve the purpose of long-term preservation.

Vacuum packaging technology the vacuum degree in packaged food is usually 600 ~ 1333 PA, so vacuum packaging is also called decompression packaging or exhaust packaging.