PPH is a circular anastomosis-mediated circumferential excision of the upper mucous membrane of hemorrhoids, not hemorrhoidectomy. The principle is: in the case of preserving the anal cushion tissue, part of the internal hemorrhoids and hemorrhoids on the mucous membrane, submucosal tissue ring-shaped excision of about 3 ~ 4cm, while anastomosis, for instant completion. The purpose of the anastomosis is to block the blood flow of the hemorrhoidal blood vessels and at the same time to suspend and fix the slipped tissues upward. That is to say, the pathological state of the rectum of the anal canal, restored to the normal anatomical state, so as to protect the anal cushion. What is the anal cushion, is the modern medicine of hemorrhoids new understanding, a new point of view, that is, think hemorrhoids is anal cushion, is everyone has the anatomical structure, the anus is also precisely with the anal cushion and sphincter, will have fine gate function. Unlike the previous belief that hemorrhoids are vascular lesions in the anal area, surgical removal damages the anal cushion, so that the fine control of defecation in the anal area is affected, and there are many complications. The PPH procedure is fully compatible with the new concept of treating hemorrhoids. The procedure became a new procedure in Western Europe and the United States three years ago, and has become a superior choice for the treatment of severe hemorrhoids. Its main indications are severe second, third and fourth degree internal hemorrhoids mainly mixed hemorrhoids, especially ring hemorrhoids patients, followed by rectal mucosal intussusception and anterior rectal bulging patients. The new technology method in the northwest of our hospital general surgery department was the first to carry out. After the operation, the pain is light, the recovery is fast, the complication is less; At present has applied the new technology has carried on the surgical treatment for more than a hundred patients, the therapeutic effect is extremely remarkable.