Objective Analyzing the causes of postpartum hemorrhage and its relationship with childbirth mode ,seeking reasonable means of prevention and cure, so as to cut down the morbidity of postpartum hemorrhage .Methods Clinical data of 95 cases of postpartum hemorrhage was analyzed retrospectively .Results Among the four mayor reasons of postpartum hemorrhage,uterine contraction accounted for 62.11%(59/95),26.31%(25/95)were placenta factors,7.37%(7/95)was the injury of soft birth canal,4.21%(4/95)due to coagulation disorders;We analyzed the relationship between childbirth mode and postpartum hemorrhage,the total morbidity of postpartum hemorrhage was 2.54%(95/3740),the morbidity of postpartum hemorrhage in spontaneous delivery group was 1.42%(29/2040),the ratio in assisted vagi-nal delivery group was 5.35%(6/112),the ratio in cesarean group was 3.78%(60/1588).Conclusion The morbidity of postpartum hemorrhage in assisted vaginal de-livery group and cesarean group was higher than the spontaneous delivery group .We should try our best to improve the ratio of spontaneous delivery in order to diminish the morbidity of postpartum hemorrhage .