The continuously modified atmosphere packaging machine is a box-type modified atmosphere fresh-keeping packaging machine launched by the company for cold fresh meat, cooked food, etc. The food is isolated from the outside air, and the tray is filled (2-3 kinds of gases are mixed according to the characteristics of the food) to keep the packaged food in its original flavor and appearance for a long time, and to inhibit various bacteria and microorganisms to the greatest extent. breeding. Thereby extending the shelf life or shelf life of the food.