Erythorbic acid and its sodium salt are widely used and have been used as food antioxidants to prevent browning in fish, meat, vegetables, fruit juices, etc. It is a new type of food antioxidant, antiseptic and preservative, which can effectively reduce the oxidation of food, prevent the fading of its color, aroma and taste. At present, the product has been widely used in meat, vegetables, fruits, alcohol, beverages, canned food, tea and other foods.