The invention discloses a Chinese medicine additive for promoting piglet growth and a preparation method of the Chinese medicine additive, wherein the Chinese medicine additive comprises the following Chinese medicinal herbs: jasminum giraldii diels, fructus cannabis, hypecoum erectum, catalpa leaf, cyrtomium fortune, rhizoma atractylodis, soybean, hawthorn, malt, all-grass of annual saltmarsh aster, dried tangerine or orange peel, areca-nut, akebiaquinata, common andrographis herb, liquorice, radix polygonum multiflorum preparata, adenosma indianum, caulis spatholobi, flax, mangnolia officinalis, radix paeoniae alba, common hogfenneI root, annual fleabane herb, glossy privet fruit, all-grass of annual saltmarsh aster, rubus hirsutus, stellaria uliginosa, chondria, adiantum capillus-veneris and neopallasia pectinata. The Chinese medicine additive has the beneficial effects of being capable of remarkably promoting the piglet growth, reducing the medicine residue, being small in toxic and side effects, being green and natural, being good in mouth feel after being eaten by people, facilitating the health, and playing a good role in health care.