Cesarean section was an important surgical solution to difficult deliveries, and in the days when antibiotics were not available, many women died from postoperative abdominal infections and secondary abdominal adhesions and intestinal obstruction. A hundred years ago, several obstetricians and gynecologists in England, Germany and France discovered a special gap between the lower part of the uterus and the bladder. After anatomical access, the uterus could be incised to complete the cesarean section without incising the peritoneal cavity. Amniotic fluid and blood do not enter the abdominal cavity and the intestinal canal is not exposed. This is an extraperitoneal cesarean delivery. After the procedure, the woman has no peritoneal pulling pain and can soon pass gas and eat. The infection rate is significantly lower. However, the procedure is difficult and not easily mastered by many obstetricians and gynecologists. Serious complications such as bladder and ureteral injury can occur if not done properly. Especially, since the introduction of antibiotics, doctors relied on antibiotics and chose the relatively simple and easy to master intraperitoneal cesarean section of the lower uterine segment. Until now the new type of cesarean delivery. The extraperitoneal cesarean section became a non-mainstream procedure, and gradually became less common in the clinic and nearly lost. Today, with the proliferation of antibiotics, there are many postoperative infections that cannot be resolved by the antibiotics available in obstetrics. Some obstetricians and gynecologists have come up with the idea of extraperitoneal cesarean delivery. The old director, who died 20 years ago, was a strong advocate of this procedure and taught me extraperitoneal cesarean delivery by hand.