The invention relates to a Chinese medicinal preparation for treating dental ulcer. The Chinese medicinal preparation is prepared by decocting the following bulk pharmaceuticals with the conventional traditional Chinese medicine decoction method in parts by weight: 10-30 parts of fructus gardeniae, 10-30 parts of honeysuckle flower, 5-30 parts of pseudo-ginseng root, 10-30 parts of coptis root, 10-20 parts of lightyellow sophora root, 5-20 parts of common lophatherum herb and 2-10 parts of borneol. The preparation has the characteristics of readily available raw materials which are Chinese medicinal herbs, no toxic or side effect, sequela resistance, unique action, easiness for preparing, good effect, quick response, remarkable curative effect, good pain relieving effect, quick healing action on ulcer, delayed relieving course and capability of regulating the immunologic function of a mechanism, can be used for basically healing dental ulcer within one week, can be used for truly achieving the effects of quick response and treatment of both principal and secondary aspects of a disease, and can be used for treating various dental ulcer diseases.