Chronic radiation enteritis is a type of disease that occurs 1 to 5 years after the completion of radiotherapy for malignant tumors of the pelvis and abdomen，or occurs after the acute radiation enteritis persists for more than 3 months，or incubates for decades before emerging.Chronic radiation enteritis often causes complications such as intestinal bleeding，intestinal obstruction，intestinal fistula，and intestinal perforation，repeated episodes of diarrhea，abdominal pain，and blood in the stool，which bring great pain to the patient and seriously affect their quality of life.The treatment of this disease is difficult，so far there is no standardized and effective unified treatment plan.Professor Li Tong's key point in the treatment of this disease is based on traditional Chinese medicine theory of hidden pathogen，the patient's constitution and primary disease，syndrome differentiation and disease differentiation were all taken into consideration，clinical efficacy is significant.Professor Li Tong's clinical experience was summarized in the paper in order to provide better treatment ideas for colleagues.