The invention discloses a method for treating the stomatitis of bamboo rats. The method comprises the following steps: (1) treating injuries, namely washing the oral cavity of a diseased rat by using a 2% alum solution, 1-2 times each day until healing; (2) applying or feeding traditional Chinese medicine miraculous pills of six ingredients, namely, grinding the traditional Chinese medicine miraculous pills of six ingredients and applying the powder to the oral cavity and the tongue of the diseased rat; and (3) adding traditional Chinese medicines and vitamins to a feed and feeding the bamboo rat with the feed. The method disclosed by the invention is capable of treating both symptoms and root causes through internal and external treatment, excellent in effect, capable of effectively treating the stomatitis of bamboo the rats, high in efficiency, quick in taking effect, low in cost, and safe without toxic and side effects; the abuse of antibiotics is avoided; the method is advantageous for healthy growth of the bamboo rats, and also capable of improving the immunity of the bamboo rats and ensuring the quality of the hair and the meat of the bamboo rats.