The invention discloses traditional Chinese medicine for treating dental ulcer, and belongs to the technical field of traditional Chinese medicine. The traditional Chinese medicine is formed by raw material medicine including folium mori, rhizoma anemarrhenae, coptis chinensis, astragalus membranaceus, radix ophiopogonis, mulberries, wine-prepared fructus corni, moutan bark, lotus leaves, albizia flower, prepared rehmannia root, golden cypress, radix scrophulariae, dendrobe, pseudo-ginseng, borneol, rhizoma cyperi, fennel, corydalis tuber, radix bupleuri, fructus aurantii, Chinese-date, ginseng, the root of red-rooted salvia, lotus plumule, greenish lily flower, poria cocos, rhizoma alismatis, radix glycyrrhizae, Chinese yam, rhizoma atractylodis macrocephalae, dioscorea oposetap thunb, endothelium corneum gigeriae galli, rhizoma cimicifugae, semen coicis and cinnamon. After the composition of the medicine ingredients, the effects of relieving swelling and pain, decreasing heat and removing fire, nourishing yin and promoting the production of body fluid, and regulating the flow of vital energy and soothing the nerves are achieved through the coordinative effect of the medicine, the therapeutic effect of treating dental ulcer is definite, pains of a patient can be effectively relieved, and the recovery of an ulcer site can be accelerated. Meanwhile, the physical mechanism of the patient is conditioned, oral ulcer recurrence is reduced and avoided, and the aims of treating symptoms and causes and being free of side effects are achieved.