目的　探讨剖宫产术后晚期产后出血发生的原因、时间、病因及防治措施。方法　回顾性分析52例 剖宫产术后晚期产后出血临床资料。结果　发病原因依次为:子宫切口感染、裂开,子宫复旧不良,胎盘、蜕膜残 留、子宫内膜炎、子宫内膜息肉。发生时间以剖宫产术后2周以上占多数(78.8%),部分病例在6周以上。结论　 剖宫产术后晚期产后出血的主要原因是子宫切口感染、裂开。时间不应局限于产褥期内,病因的诊断、防治值得重 视。 Objective To investigate the causes, time, etiology and prevention and treatment of late postpartum hemorrhage after cesarean section. Methods A retrospective analysis of 52 cases of postpartum cesarean section postpartum hemorrhage clinical data. Results The causes of morbidity were as follows: uterine incision infection, dehiscence, bad uterine involution, placenta, decidua, endometritis and endometrial polyps. Cesarean section occurred more than 2 weeks after the majority (78.8%), in some cases more than 6 weeks. Conclusion The main reason of postpartum hemorrhage after cesarean section is infection and dehiscence of uterine incision. Time should not be confined to the puerperium, the diagnosis of the cause, prevention and treatment worthy of attention.