The invention belongs to the technical field of traditional Chinese veterinary medicines and in particular relates to a Chinese medicinal herb feed additive capable of improving the protein content of rabbit meat and a preparation method. Active components of the Chinese medicinal herb feed additive capable of improving the protein content of the rabbit meat are prepared from the following raw materials: cortex magnoliae officinalis, radix puerariae, fiveleaf gynostemma herb, bighead atractylodes rhizome, poria cocos, medicated leaven, Chinese magnoliavine fruit, radix bupleuri, fructus hordei germinatus, tangerine peel, liquorice root, radix astragali seu hedysari, fructus crataegi, radix rehmanniae praeparata, rhizoma chuanxiong, radix pseudostellariae, caulis spatholobi, rhizoma pinelliae, rhizoma dioscoreae, semen armeniacae amarae, cape jasmine fruit and fructus jujubae. The Chinese medicinal herb feed additive capable of improving the protein content of the rabbit meat has a reasonable prescription, is simple to prepare and has no toxic side effect and no residues; the protein content in the rabbit meat can be effectively improved and the quality of the rabbit meat is improved.