The invention provides a Chinese herbal medicine feed additive capable of improving the immunity. The Chinese herbal medicine feed additive is characterized by comprising the following raw materials: willow herb, red-backed vegetable, Chinese yam, herba epimedii, jiaoshen yeast, caulis spatholobi, puerarin, cimicifugae foetidae, Chinese herbaceous peony, jian yeast, rheum officinale, mangnolia officinalis, cyrtomium fortunei, liquorice, radix scutellariae, honeysuckle stem, gynostemma pentaphylla, fuling, soy isoflavone, soyasaponin and additional components, wherein the additional components comprise vitamin A, vitamin B, vitamin C, chromium trichloride, huanyuan gel, xylitol and mannitol crystals according to the proportion of 0.2:0.2:0.5:0.3:1:1:1. The Chinese herbal medicine feed additive can replace antibiotics and medicines and has no toxic and side effects; the immunity of animals such as pigs, chicken and ducks can be obviously improved; relatively high economical benefits can be achieved with relatively small investment; antibiotic and chemical medicine residues are avoided; and an effective way is supplied to reducing the antibiotic residues in animal products.