The differential diagnosis of chronic enteritis mainly requires differentiation from intestinal tuberculosis, functional enteritis, ulcerative colitis and gastrointestinal dysfunction, etc. In general, it is recommended that patients undergo colonoscopy for relatively direct and effective judgment and, if necessary, pathological biopsy, which can clarify the relevant diagnosis. The diagnosis of intestinal tuberculosis can be further differentiated by sputum examination of sputum antacid bacilli and blood count. Ulcerative colitis can also be treated by experimental medication, such as symptomatic treatment by salazosulfadiazine, if the effect is obvious can be basically judged to be ulcerative colitis, there is also a part if the chronic enteritis caused by bacterial dysentery can be treated by targeted antibiotics, but also laboratory diagnosis, the diagnosis of bacterial dysentery disease. If it is neurosis is generally perfect after the relevant examination, no obvious organic lesions are found, before considering the diagnosis of functional disease.