Composite antioxidant, preparation method thereof and feed

The preparation method comprises the following steps: (1) under the condition of normal temperature, dissolving butylated hydroxytoluene in a first solvent, then adding a second solvent, uniformly mixing, then adding tert-butylhydroquinone, and mixing to dissolve the tert-butylhydroquinone so as to obtain a mixed solution; and (2) adjusting the pH value of the mixed solution to obtain a finished product of the composite antioxidant. The invention also discloses a feed, which comprises grease and the composite antioxidant disclosed by the invention. In the feed production process, the compound antioxidant is adopted, the adding mode is simple and convenient, the compound antioxidant can be directly added in a cold spraying mode, the production efficiency is effectively improved, the requirement for production equipment is low, and the compound antioxidant is suitable for industrial production. 本发明公开了一种复合抗氧化剂及其制备方法，其制备方法包括：(1)在常温条件下，将二丁基羟基甲苯溶解于第一溶剂中，然后加入第二溶剂，混匀，再加入特丁基对苯二酚，混合使其溶解，得到混合溶液；(2)调节混合溶液的pH值，即得到复合抗氧化剂成品