There are three main pathological changes in the pathogenesis of rectal prolapse: 1. The rectal mucosa is not firmly fixed with the base, the mucosa repeatedly prolapses, and the surface becomes inflamed, congested, and even eroded. 2, rectal mucosa downward prolapse, and pull the rectum, resulting in rupture of the perirectal fibrous membrane, causing prolapse of the whole rectum. 3, the anus is subjected to long-term external expansion of the full rectum, the anal sphincter is relaxed and weak, the pressure of the anal canal decreases, the centripetal force and tightness around the anus decreases significantly, and the centripetal force cannot counter the vertical pressure of the rectum, resulting in habitual episodes of rectal prolapse. Therefore, to treat rectal prolapse, it is necessary to solve both the problem of rectal mucosa and muscle layer subluxation and the problem of anal flaccidity and weakness, and only by rebuilding the balance of both forces can rectal prolapse be finally cured. Traditional treatment of rectal prolapse: 1, submucosal plus perirectal injection method: this method is the classic method of Chinese medicine, through the injection of sclerosing agent in the rectal submucosa and perirectal gap, to achieve local sterile inflammatory adhesions, to play a “fixed off” role, however, practice has proved that, although the method is simple and easy, but the main drawback is It is easy to recur, and the aseptic operation required when injecting in the perirectal space is extremely high, otherwise it is easy to form a high level of infection in the space and form an abscess. 2, trans-perineal bowel resection: the method is to remove the prolapsed anal canal, and then suture the mucosal layer, muscle layer, and plasma layer, respectively, although the efficacy is safe and reliable, but the operation is difficult and easy to form rectal strictures. 3, open rectal suspension: the method is to open the abdomen and then free the rectum, then raise the rectum and fix it with mesh strips around the rectum and fascial sutures in the sacral midline to prevent the rectum from slipping downward. The surgery is thorough, and the disadvantage is that the surgery is difficult and expensive. Balanced mechanics for rectal prolapse: 1. By intermittent, punctiform and circular ligation of the rectal mucosa, the rectal mucosa is shortened longitudinally and the internal diameter becomes smaller. Due to the extensive scar fixation under the mucosa, adhesion between the mucosa and the muscle layer occurs, and the tension of the shortened mucosa increases, giving outward support to the rectal muscle layer, fixing the rectal muscle layer between the shortened mucosa and the intrinsic fascia of the rectum, and achieving that the whole rectum no longer prolapses. 2.Multiple radial shuttle incisions are made around the anus with the anus, and the corresponding parts of the rectal mucosa are ligated at the same time, so that the anal canal is reduced to counter the vertical pressure of the rectum. Then subcutaneous tightening is done with absorbable threads around the anus. The combination of submucosal ligation and perianal tightening can restore the mechanical balance between the perianal and rectal areas, which is certainly effective, safe, reliable and easy to operate.