The invention provides a traditional Chinese medicine composition for treating oral ulcer. The traditional Chinese medicine composition comprises the following medical raw materials: sargentgloryvine stems, honeysuckle stems, coptidis rhizome, radix scutellariae, gypsum, white peony root and liquorice. Compared with a western medicine for treating the oral ulcer, the traditional Chinese medicine composition has the advantages of good treating effect, low toxic or side effects, low recurrence rate and high cure rate.