Objective：To investigate the clinical features，diagnosis，and treatment of patients with severe pelvic infection referred to our hospital from other hospitals. Methods：A retrospective analysis was performed for the clinical data of 9 patients with severe pelvic infection during the postpartum period who were admitted to the First Affiliated Hospital of Army Medical University from January 2010 to October 2017. Results：Of all patients，6 gave birth in a secondary hospital and 3 gave birth in a local health center；3 adopted vaginal delivery，and 6 underwent cesarean section. Among the 6 patients who underwent cesarean section，2 underwent elective cesarean section（among whom 1 had scarred uterus and 1 underwent cesarean section due to social factors） and 4 were converted to cesarean section due to failed vaginal delivery. All 9 patients had severe fever after delivery，with a body temperature of 38.9 ℃-41 ℃；of all patients，7 had lower abdominal pain and 2 had no obvious abdominal pain；4 patients had intestinal obstruction after cesarean section. One patient died of the rupture of infectious thoracic aortic aneurysm on day 11 after cesarean section，and the other 8 patients were cured and discharged after intravenous anti-infective therapy，drainage，or removal of the foci of infection. Conclusions：Induction of labor in midtrimester pregnancy and cesarean section without indications are not recommended. The role of drainage during and after surgery should be taken seriously in patients who undergo cesarean section and are suspected of infection. Increased body temperature after delivery，lower abdominal pain，and intestinal obstruction symptoms may be early symptoms of severe pelvic infection，and surgical treatment should be given if conservative treatment with antibiotics achieves no response.