The main role of food additives is to prevent food spoilage, can extend the shelf life of food.At the same time, it can also improve the sensory properties of food to meet people's sensory needs.At the same time food additives in some natural food nutrition fortifier, can improve the nutritional value of food, can promote the balance of nutrition.At the same time, some of the food additives in the defoaming agent, or stabilizer to facilitate food processing operations.At the same time, food additives can meet people's different needs, can bring great convenience to people's life and work.