Deoxidizers, also known as deoxidizers and oxygen absorbers, are additives that can absorb oxygen and slow down food oxidation. They are new products being used in food preservation. It is a group of chemical mixtures that are easy to react with free oxygen or dissolved oxygen. It is packed in a sealed paper bag with a certain degree of permeability and strength. Like a desiccant bag, it is sealed in the food bag with the food, which can remove the oxygen left in the air in the bag, prevent food from discoloration, deterioration and oil rancidity due to oxidation, and also prevent mold The growth of aerobic bacteria and grain pests can be inhibited. At present, deoxidizer is not only used to maintain the quality of food, but also used for the preservation and rust prevention of grain, feed, medicine, clothing, fur, precision instruments and other items.