When multiple intestinal polyps and chronic proctitis exist three years ago, there is a possibility of cancerous transformation if both diseases are not treated or intervened for a long time. Intestinal polyps can be clinically divided into adenomatous and non-adenomatous polyps. Non-adenomatous polyps, also known as non-tumor polyps, are generally not cancerous, while adenomatous polyps are divided into tubular adenomas, choriocarpous adenomas and tubular choriocarpous adenomas, which are all cancerous, and adenomatous polyps are cancerous in relation to their size, histological type, and degree of atypical hyperplasia. Chronic proctitis is an inflammatory disease with rectal mucosal lesions, which refers to the slow onset of the disease or transformed from acute proctitis, chronic diarrhea is one of the main symptoms, and the inflammation may become cancerous if it remains untreated for a long period of time. If the diagnosis of intestinal polyps and chronic proctitis, it is recommended that early standardized treatment to avoid the progression of the disease.