Early stage bowel cancer does not have obvious specific manifestations, so there is no special test paper for detection, and the diagnosis is usually confirmed by rectal fingerprinting combined with colonoscopy. Early symptoms of bowel cancer are not very typical, there may be hidden pain in the abdomen or change of stool habit, mucus and bleeding in stool, constipation and diarrhea alternately, accompanied by fatigue, such symptoms have no obvious specificity, and there is no so-called early bowel cancer test paper at present. Screening for bowel cancer usually includes rectal palpation and colonoscopy. Rectal finger test is an inspection method in which the index finger is inserted into the rectum from the anus. It is simple, convenient, cost-effective and can detect about 70% of rectal cancers. The combination of colonoscopy on the basis of rectal diagnosis can usually lead to a clear diagnosis. When the above symptoms appear, it is recommended to go to the hospital in time to improve the rectal finger diagnosis and enteroscopy, and if there is any lesion, give reasonable and standardized treatment under the guidance of professional doctors.