The high-power vacuuming system can extract the oxygen in the box to1 the extreme.Using PLC and human-machine interface operating system,the parameter setting is intuitive and accurate,the operation is convenient,the operation is stable,the product has a long shelf life,reliable quality,and stable packaging performance.,high efficiency and wide applicability. The box-type modified atmosphere sealing machine adopts a high-precision gas mixing system,which can quickly change the types and mixing rations of different fresh-keeping gases according to the fresh -keeping needs of different foods,so that the packaged foods can maintain the original flavor and appearance for a long time.Inhibit the growth of various bacteria and microorganisms to the greatest extent,so as to achieve the fresh-keeping effect required by customers.