The invention relates to the field of
animal feed additive, in particular to a
feed additive for improving
immunity for beasts and birds. The
feed additive comprises the following components in weight portion: 2 to 5 portions of spirulina
powder, 1 to 3 portions of milk veteh, 1 to 3 portions of radix codonopsitis, 1 to 5 portions of
forsythia, 3 to 7 portions of purslane, 0.4 to 1 portion of
honeysuckle, 0.2 to 0.5 portion of licorice, 1 to 5 portions of
calcium biphosphate and 0.01 to 0.05 portion of
citric acid. The spirulina
powder, the milk veteh, the radix codonopsitis, the
forsythia, the purslane, the
honeysuckle and the licorice are subjected to
superfine grinding, filtered by a shaking screen with 100 to 200 meshes, and then mixed with
calcium biphosphate
powder and
citric acid powder, stirred evenly, sterilized, cooled, and packaged to obtain the
feed additive. The feed additive is a pure natural
traditional Chinese medicine preparation, has no medicament residue and no toxic and side effects after long-term use, enhances the
immunity of organisms, can obtain the
bird egg products in accordance with export standard after the birds eat the feed additive, does not generate medicament resistance, has low
raw material cost, and is suitable for industrial volume production.