pelvic organ prolapse (POP) refers to the prolapse of pelvic organs inside or outside the vagina[1]。 In 2001, the National Institutes of Health (NIH) proposed the definition of POP as: the leading edge of any vaginal segment reaching or exceeding the limbus of the hymen by more than 1 cm. Prolapse can occur alone, but generally it is a combination of multiple organs. The descent or protrusion of the bladder into the upper part of the anterior vaginal wall is called cystocele or bulging of the anterior vaginal wall. Prolapse in the lower part of the posterior wall of the vagina is called proctocele or bulging of the posterior wall of the vagina. The bulge of the upper posterior wall of the vagina is often accompanied by recto-uterine depression hernia, which is called intestinal hernia because of the large number of intestines in it. Vaginal dome prolapse or vaginal ectropion is seen after transvaginal or transabdominal hysterectomy, suggesting a defect in the supporting structure of the upper vagina.