The present invention provides a feed additive for bamboo rats. The additive includes the following raw medicinal materials: fructus terminaliae billericae, serissa serissoides, herba hydrocotylis, sedum lineare, honeysuckle stems, fructus ligustri lucidi, herba dendrobii, pinna pectinata, black sesame seeds, radix ophiopogonis, radix adenophorae, rhizoma panacis majoris, ploygonatum cirrhifolium rhizomes, potatoes, radix hedysari preparata, austral akebia roots, herba moslae, bischofia javanica, franxinus pistacifolia barks, fructus oryzae germinatus, rhizoma panacis japonici, myriopteron extensam roots, mulberries, glutinous rice roots and tofieldia divergens. The beneficial effects are as follows: the components are the traditional Chinese medicinal materials having medicinal and edible dual roles, the feed additive can significantly improve the immunity of the bamboo rats and the survival rates of young rats, and promote the growth speed of the bamboo rats, and the meat of the bamboo rats is rich in nutrition. The feed additive greatly improves edible and medicinal values of the bamboo rats, improves the economic efficiency of raising households, and has advantages of being simple, scientific and reasonable in formula, purely natural, green and residue-free, strong in practicability, free of toxic and side effects, and significant in effects.