Postpartum pelvic closure is a treatment method for women after natural delivery, because most women will lead to the separation of pubic symphysis after natural delivery. Pelvis is a bony structure that constitutes the pelvic cavity and plays a role in protecting pelvic organs. Therefore, pelvic closure can maintain the stability of organs and prevent the common clinical uterine prolapse. Generally, pelvic closure is the best after 2~3 months of natural delivery, and the best time for caesarean section is 6 months.