It can diagnose a variety of anal and rectal diseases, and is the most intuitive and practical examination method with strong reliability, which can provide a basis for further treatment. The position of the patient can be generally divided into chest and knee position, left side lying position, and supine position. 70%-80% of rectal cancers can be palpated during rectal examination, which can improve the diagnosis rate, and The need for anal fingering is very important and clinically significant because it can detect intestinal cancer, rectal polyps, as well as internal hemorrhoids, anal fistulas, and perianal rectal abscesses and anal papillomas.