The etiology of rectal prolapse is multifaceted, with anatomic factors, chronic increased abdominal pressure, pelvic floor soft tissue defects, and other factors such as aging, low estrogen, obesity, tobacco use, and surgical history also associated with prolapse. According to the degree of prolapse, there are two categories: partial and complete. 1, partial prolapse (incomplete prolapse) prolapse is only the lower mucosa of the rectum, so also known as mucosal prolapse, often mainly in the anterior rectal wall. The length of prolapse is 2 to 3 cm, generally not more than 7 cm, the mucosal folds are radial, and the prolapse is composed of two layers of mucosa. There is no groove gap between the prolapsed mucosa and the anus. 2.Complete prolapse is a total prolapse of the rectum, and in serious cases, the rectum and anal canal can be turned out to the outside of the anus. The length of prolapse is often more than 10cm, or even 20cm, in the shape of a pagoda, the mucosal folds are arranged in a ring, the prolapse is composed of two layers of folded intestinal wall, which is thicker to touch, and there is a peritoneal gap between the two layers of intestinal wall.