The machine has good vacuum performance and is suitable for vacuum packaging of various plastic bag composite bags. The machine is small in volume, simple in structure and easy to use. The preservation period of the sealed food can be prolonged under normal temperature, and the food in the refrigerator can be effectively prevented from tasting, deterioration, dehydration and cracking. The machine can effectively preserve, preserve, preserve, protect against moisture, mildew, rust, antique, dry and fresh fruits, tea, raw and cooked meat and other articles or foods which need to be preserved for a long time, such as medical supplies, electronic devices, audio-visual products, cameras, woolen clothing, gold and silver jewelry, antique calligraphy and painting, dried and fresh fruits, and so on. The effect of pollution, oxidation and vacuum sterilization can prolong the storage period. All kinds of soft packaged food packaged by the machine are easy to carry and suitable for field operations and business trips. It is also suitable for small business enterprises, medical units, large and small hotels and guesthouses in various commercial outlets. It is a necessary product for improving economic efficiency and service quality.