Chronic ulcerative colitis is a chronic inflammatory disease of the large intestinal mucosa of unknown origin, mainly involving the rectum, sigmoid colon, and even the whole colon and the end of the ileum, invading the mucosa and submucosa, accompanied by varying degrees of congestion, edema, erosion and superficial ulceration of the colonic mucosa, with abdominal pain, diarrhea and mucopurulent stools as the main symptoms. The main symptoms are abdominal pain, diarrhea and mucopurulent stools. The disease is characterized by long duration, recurrent attacks and persistent and difficult to heal. Boil 1 dose of enema herbal medicine on high heat and then decoct it for 60min on low heat and take about 250 – 300ml of thick juice. Each time 50ml, divided into 2 enemas, 15d for a course, 3 months for a cycle, continuous medication until the symptoms are completely relieved. Operation method of Chinese medicine retention enema: Patients take the left side lying position, enema tube coated with paraffin oil, insert the enema tube into the anus about 10-15cm, the temperature of the liquid to the touch of the back of the hand to feel warm and comfortable, use a 50ml syringe to slowly push 50ml of Chinese medicine decoction into the anus, and then slowly pull out the enema tube. Wipe off the paraffin oil and overflowing liquid outside the anus with hand towel. After the enema, ask the patient to lie in knee-chest position for 0.5 to 1 hour to prolong the retention time. Generally speaking, the longer the retention time, the better the efficacy. Prevention 1, pay attention to the abdomen, hands and feet to keep warm, avoid cold, diet is a very important aspect. The disease in the attack period, remission period can not eat beans and soy products, wheat and flour products, as well as garlic, leeks, yams, eggs, cabbage, peanuts, melon seeds and other easy to produce gas food. The reason is that once you eat, the gas in the gastrointestinal tract increases, gastrointestinal dynamics are affected, which can trigger the disease, and even intensify the symptoms; 2, chronic colitis patients should also closely observe their adaptability to various foods, pay attention to individual differences. If you eat some of the food should not affect the intestinal tract after diarrhea aggravated, we must find out the reasons, find out the rules, and try not to eat in the future; 3, chronic colitis patients are weak, poor resistance, especially the gastrointestinal tract is prone to complications of infection, so you should pay more attention to dietary hygiene, do not eat cold, hard and spoiled food, alcohol and spicy stimulating condiments; 4, persimmons, pomegranates, apples contain ellagic acid The pectin and pectin components, have astringent antidiarrheal effect, chronic colitis can be eaten in moderation; 5, patients should usually strengthen exercise, such as playing Taijiquan, in order to strengthen the waist and kidneys, enhance physical fitness; 6, keep a calm state of mind, control emotions, reduce the mental burden and mental trauma.