Abstract: Objective: To investigate the etiology and the treatment of postpartum hemorrhage.Methods: Strengthening uterine contraction,keeping effective circulation and removing etiological factor were used to treat 367 women with postpartum hemorrhage in our hospital.Results: The primary reason of postpartum hemorrhage was the weakness of uterine contraction in 209 cases.The placenta factor and laceration of birth canal was the second cause.The risk factors were the caesarean delivery,the large infant,the extension of labor cause,the residue of placenta or embryolema and all kinds of pregnancy complications.Conclusions: To prevent postpartum hemorrhage is one of the important measures to improve the quality of obstetrics and reduce the mortality of pregnant and lying-in women.