Deoxidizer as a new food preservation material has its unique advantages. The food is contained in the same container as the food. The oxygen absorber absorbs the oxygen in the container so that the container is in an oxygen-free state and the food is preserved. However, the raw material of the deoxidizer must have such side effects as stable reaction, no strange taste, and no harmful gas generation, and it is harmless to the human body in case of accidental eating. Deoxidizers generally use iron powder as their basic raw material. They can be used in general foods to maintain food quality and extend shelf life. They can be used in healthy foods to prevent oxidation of oils, prevent fading and maintain nutrients. Deoxidizers have been widely used in foreign countries for wet bread flour, wet noodles, wet noodles, wet snacks, semi-dry fish products and other foods. At present, there are caps for deoxidation agents in addition to bags. Bags are used for bagged foods, and caps are used for bottles, cans and other containers. In recent years, with the development of the food industry and the improvement of packaging materials, deoxidizers have become more and more important in China, and applications have become more and more widespread.