The products after packing can be prevented from oxidation, going mould, insects or getting damp, thus can be kept fresh for longer time.The machine can vacuum pack several products at the same time, which is efficient in continuous production in middle or small scale.It adopts relay control, while PCB control is as optional.The vacuum chamber could be added with PP insert plate for products with different heights to improve the vacuum efficiency.It could be equipped with dust filter for the products similar to powder.The depth of vacuum chamber could be customized.