Method for degrading gossypol in cottonseed meal by applying oxidase

The invention discloses a method for degrading gossypol in cottonseed meal by applying oxidase. The method comprises the following steps of: spraying an oxidase aqueous solution and hydrogen peroxide with concentration of 1/10000 to the surface of cottonseed meal, wherein the mass ratio of the oxidase aqueous solution to the cottonseed meal is (1:9)-(4:1); and keeping the oxidase aqueous solution and the cottonseed meal for 10-30 hours at 20 DEG C-40 DEG C, and taking out the cottonseed meal. According to the method for degrading gossypol in cottonseed meal by applying oxidase disclosed by the invention, the oxidase can be used for degrading bound gossypol and free gossypol in the cottonseed meal, and the substances generated by degrading are pyrocatechin, i.e., catechol and a derivative thereof. The catechol and the derivative thereof have an antibacterial effect and an anti-oxidation effect, so that the adding amount of the antibiotics and antioxidant in the cottonseed meal feed is reduced, and therefore, t