Abstract: Objectives:To explore more efficient and effective methods of prevention and treatment of postpartum hemorrhage caused by placenta previa，Methods:12 cases of placenta previa cases were retrospectively analyzed and review of literature in our hospital in 2009.Results:8 cases of prophylactic treatment were not postpartum hemorrhage, 3 cases of complete placenta previa and low-set one cases of postpartum hemorrhage after placental hemostasis effective treatment, 12 patients were discharged shortly.Conclusions:In the spin-off of placenta previa face painting, " external fibrin glue" (later referred to as "freezing"), hemostasis achieved significant results, also with the three-cavity tube made Frey's bladders (later referred to as "cystic") pressure reduction re - bad lower uterine segment can be effective in preventing and treating postpartum hemorrhage due to placenta previa, can reduce the incidence of postpartum hemorrhage in clinical workIn clinical work, the above-mentionde are certain guiding significance

Key words: Placenta previa, Postpartum hemorrhage, External fibrin glue, Frey, s three-cavity tube