The invention relates to a Chinese patent medicament for treating ulcerative colitis, which is characterized in that: the Chinese patent medicament is prepared from the following raw material medicaments in part by weight: 25 to 35 parts of dioscorea root, 25 to 35 parts of copperleaf herb, 15 to 20 parts of pilose asiabell root, 10 to 15 parts of largehead atractylodes rhizome, 10 to 15 parts ofwhite paeony root, 15 to 25 parts of lotus leaf, 4 to 8 parts of divaricate saposhnikovia root, 4 to 8 parts o villous amomum fruit and 3 to 8 parts of liquoric root. The invention aims to provide the Chinese patent medicament for treating the ulcerative colitis for patients with the ulcerative colitis, which has the advantages of simpleness, economy, shot treatment course, obvious curative effect, low recurrence rate after curing and no toxic or side effects in clinical use.