Ulcerative colitis belongs to the category of “blood in stool”, “abdominal pain” and other diseases in Chinese medicine, Qingyu San can be used for the treatment of damp-heat type of ulcerative colitis. Ulcerative colitis is characterized by recurrent diarrhea, mucus, pus and blood in stools, abdominal pain, etc. It is difficult to cure this disease, and often recurs, and TCM evidence-based treatment of ulcerative colitis has a better effect on reducing the number of episodes and alleviating the symptoms. Qingyu San is composed of light powder, longhu and other drugs, can be used to treat intestinal damp-heat type ulcerative colitis, in the attack or remission period can be used, the mechanism of Qingyu San to promote intestinal mucosal healing, reduce intestinal inflammation, so it can be effective in controlling the condition. The use of Chinese medicine needs the guidance of a doctor, should not be self-medication, so as not to delay the condition.