According to the condition of ulcerative colitis, it can be further divided into active and remitting stages. The severity of the disease in the active stage is divided into mild, moderate and severe, which needs to be evaluated by professional clinicians in combination with the number of diarrhea, blood in stool, pulse, body temperature, hemoglobin and blood sedimentation. In mild cases, the number of diarrhea is less than 4 times per day, blood in stool is light or absent, there is no fever, rapid pulse or anemia, and the erythrocyte sedimentation rate (ESR) is normal; in severe cases, diarrhea is up to 6 times per day or more, with obvious mucus and blood stool, body temperature >37.8℃, pulse >90 times/min, hemoglobin (Hb) <100g/L, and ESR >30mm/h. Moderate patients are between mild and severe. In the case of ulcerative colitis, the current clinical treatment goal is to achieve rapid remission and mucosal healing. The active phase of ulcerative colitis is characterized by diarrhea, mucopurulent and bloody stools, abdominal pain, and shortness of breath, so the relief of clinical symptoms is the main focus of treatment for this disease, and this is where the advantages and strengths of herbal compounding lie.