Compound gas flushing preservation packaging machine is a new food and vegetable preservation packaging equipment developed on the basis of vacuum packaging machine and nitrogen filling packaging machine. Its greatest feature is to solve the larger damage of food taste after vacuum packaging and high temperature sterilization, and the investment of aseptic packaging which is required by nitrogen filling packaging. Through compound gas flushing packaging, it can ensure the original taste of food, and guarantee the authenticity of food in terms of taste and appearance.