Double chamber vacuum bag sealer eliminates most air (oxygen) in the package, which can effectively prevent food from spoilage. Double chamber vacuum bag sealer work together with packaging materials with excellent barrier and strict sealing technology can effectively avoid food weight loss, loss of flavor, and can prevent secondary pollution. The gas inside the vacuum packaging container has been eliminated, which accelerates the heat conduction, which can improve the efficiency of thermal sterilization and avoid the packaging container breaking due to the expansion of gas during the heating sterilization. In the food industry, the application of double chamber vacuum bag sealer is very common and double chamber vacuum bag sealer is widely used for a variety of cooked products such as chicken legs, ham, sausage, grilled fish, beef jerky, etc. Pickled products such as pickles, bean products, preserved fruit and other foods that need to be preserved are increasingly packaged in vacuum package. The shelf life of products packed by double chamber vacuum bag sealer is grealy extended.