Abstract: With the development of laparoscopy technology, it plays an increasingly important role in the diagnosis and treatment of gynecological pelvic floor dysfunction diseases. It has a definite effect in solving the problems of middle pelvic cavity and anterior pelvic cavity. Laparoscopic diagnosis and treatment of posterior pelvic cavity defects are rarely reported. There are few literatures describing the diagnosis and treatment of posterior pelvic cavity defects through laparoscopic surgery. A POP-Q score is given for a case：Aa-3, Ba-3, C+2, Ap+3, Bp+3, D+1. Considering the patients with uterine prolapse Ⅲ degree and rectocele Ⅲ degree, the gynecological pelvic floor and oncology department of Chongqing Maternal and Child Health Hospital designed a new operation for the patients with pelvic defect in the middle and posterior pelvic cavity. It can correct the posterior pelvic defect while correcting the middle pelvic defect, and can achieve the advantages of flat mesh and adjustable. Self-tailored Artisyn-Y mesh was used to fix cervix and suspend uterus to correct middle pelvic defect, and to reinforce vaginal rectal fascia to correct posterior pelvic defect.

Key words: Pelvic organ prolapse, Gynecologic surgical procedures, Laparoscopes, Y-mesh, Posterior pelvic defect