Constipation is generally divided into two categories: organic constipation, caused by various diseases; functional constipation, mostly due to injuries, medications, and poor living and defecation habits. Clinically referred to as chronic intractable constipation, refers to the duration of the disease more than two years, by the drug and a variety of non-surgical treatment is difficult to work, and the need for surgical treatment. Primary constipation refers to the cause of the disease is not clear, treatment difficulties; secondary constipation for congenital disease injury, drugs and surgery and other causes. Clinical for the guidance of the treatment and commonly used classification is as follows: 1, rectal-anal tube outlet obstruction type constipation: is due to a variety of reasons lead to the pelvic floor muscle dysfunction intractable constipation, most common in women, manifested as defecation difficulties, defecation incomplete, laxative is often ineffective; in severe cases, sacrococcygeal distension. In women, this may be accompanied by vaginal or uterine prolapse, which often requires the patient to squeeze the vagina or pick out the dry feces present at the end of the rectum. On rectal palpation, increased pressure in the anal canal is perceived, with loosening and accumulation of the rectal mucosa, and in some cases, the anterior wall of the rectum bulges out toward the vagina. Defecography and rectal manometry confirm the diagnosis, showing pelvic floor muscle dysfunction and a normal colonic transport test. This type of constipation is further divided into several cases: ① anterior rectal protrusion: most common in women, according to the degree of protrusion of the rectum to the front is divided into three degrees, that is, light, medium and severe, of which the severe degree requires surgical repair. ② rectal intussusception: also called rectal prolapse, mostly due to the rectum is too long, coupled with long-term defecation force, so that the rectal mucosa and muscle layer separation. Palpation can touch the accumulation of mucosa, rectal mucosal ligation can be performed through the anus, but the effect is not lasting. ③ Puborectal muscle syndrome: related to spastic hypertrophy of puborectal muscle. Palpation, anal canal lengthening, muscle tension increases; anal canal manometry, resting and systolic pressure are increased; X-ray examination, there is a “shelf sign”. It can be treated with puborectal muscle partial resection. ④ Perineal descent syndrome: for radiologic diagnosis, the upper anal canal is at the line between pubic symphysis and coccyx, if it is lower than 2 cm during defecation, it is perineal descent. 2.Colon slow transportation type constipation: this type, colon transportation is slow, pelvic floor muscle function is normal, clinically manifested no bowel movement, stool less, abdominal distension; light oral gastrointestinal power drug is effective, heavy feasible colon subtotal resection, ileum, sigmoid colon or rectal anastomosis. But need to exclude intestinal irritability syndrome.