The invention relates to the field of a traditional Chinese medicine, and particularly relates to a traditional Chinese medicine for treating dental ulcer. The traditional Chinese medicine is prepared from the following raw materials in parts by weight: 5-15 parts of asarum, 6-14 parts of honeysuckle, 5-18 parts of fructus evodiae, 3-14 parts of indigo naturalis, 7-11 parts of radix scutellariae, 6-14 parts of coptis chinensis, 9-12 parts of lophatherum gracile, 4-13 parts of cortex lycii radicis, 5-17 parts of fructus forsythia, 6-18 parts of astragalus membranaceus, 9-17 parts of blackberry lily, 5-12 parts of radix asteris, 6-18 parts of cynanchum glaucescens, 7-12 parts of tuckahoe, 6-15 parts of semen lepidii, 3-17 parts of bitter apricot kernel, 4-12 parts of cassia twig, 5-17 parts of pericarpium citri reticulatae, 6-13 parts of pinellia ternate, 9-17 parts of liquorice, 2-14 parts of semen raphani, 5-14 parts of angelica sinensis, 6-17 parts of saffron crocus, 6-13 parts of stiff silkworm, 7-14 parts of fructus aurantii, 8-15 parts of mangnolia officinalis, 6-17 parts of adenophora stricta, 6-10 parts of radix polygonati officinalis, 7-14 parts of jasminum grandiflorum, 2-10 parts of herba portulacae, 5-17 parts of root of Chinese pulsatilla, 6-18 parts of baked ginger, 7-10 parts of sargent gloryvine, 8-15 parts of polygonum cuspidatum, 2-17 parts of seed of Chinese dodder, 6-17 parts of Chinese honey locust, 6-17 parts of herba lycopi, 5-17 parts of corydalis tuber and 6-18 parts of calamus. The traditional Chinese medicine is significant in effect on treatment of the dental ulcer and free of toxic and side effects.