Corn gluten meal is a by-product of corn grains produced by starch in the food industry or purified by the wine industry. It is rich in protein and nutrients, and has a special taste and color. It can be used as feed. Compared with fish meal and bean cake commonly used in the feed industry, it is a resource It has obvious advantages, high feed value, does not contain toxic and harmful substances, does not need to be reprocessed, and can be directly used as protein raw materials. Due to its low price as a feed, in recent years, some companies have used corn gluten meal as raw materials to extract zeaxanthin and corn gluten from it and develop them into functional foods, greatly increasing the added value.