Antibiotic-free feed additive and preparation method thereof

The invention relates to the technical field of feed additives, in particular to an antibiotic-free feed additive and a preparation method thereof. The preparation method of the antibiotic-free feed additive comprises the following steps: preparation of the passion fruit shell extract, preparation of an inclusion material, microbial inclusion processing and preparation of the antibiotic-free feed additive. According to the antibiotic-free feed additive disclosed by the invention, the passion fruit shell extract is added into the antibiotic-free feed additive, so that the organism resistance is improved, the disease occurrence of live pigs is reduced, and the growth of the live pigs is promoted; through preparation and addition of the microbial inclusion compound, microorganisms are included in the inclusion material, so that the microorganisms can be wrapped and protected, the effectiveness of the microorganisms in the antibiotic-free feed additive is ensured, and the herbal medicine volatile oil component in