It can be used as a word antioxidant to protect the vitamins in the feed and prevent the oxidative loss of fat and protein. It also has certain antibacterial effect. BHT is an oil-soluble antioxidant widely used at home and abroad. Although the toxicity is large, but its antioxidant capacity is strong, heat resistance and stability is good, neither specific odor, nor metal ion color reaction and other shortcomings, and low price, only 1/8-l/5 of BHA, is still used as the main antioxidant in China , generally used with BHA, and citric acid or other organic acids as synergists.