Functional livestock feed additive, and preparation method thereof

The invention relates to the field of livestock feed additives, in particular to a functional livestock feed additive, and a preparation method thereof. The functional livestock feed additive is prepared from the following raw materials in parts by weight of 5-10 parts of saccharicterpenin, 3-6 parts of garlicin, 3-6 parts of yeast germanium, 5-10 parts of medicated leaven, 6-12 parts of humulus lupulus herbs, 3-5 parts of 5-nitroguaiacol sodium salt, 1-3 parts of bifidobacterium bifidum and 0.1-0.5 part of lactobacillus plantarum. The functional livestock feed additive is free from residues and free from drug tolerance, and has the efficacy of promoting digestion of animals, effectively improving situations of gastrectasia or indigestion of the animals, promoting growth and development ofthe animals, reinforcing specific immunity functions of organisms, controlling diseases of livestock and poultry, and improving meat quality of the animals, and the utilization rate of a feed can benotably increased. 本发明涉及畜牧