Objective To explore the application value of improved B-Lynch suture in the treatment of cesarean section refractory hemorrhage.Methods To analyze retrospectively the information of cesarean section refractory hemorrhage patients who have taken conventional treatment or improved B-Lynch suture treatment in our hospital,taken the conventional treatment.the uterus was remove when it's invalid.the improved B-Lynch suture treatment was taken.Results In the improved B-Lynch suture treatment group,the patients have apprently little blood loss,shorter time in the cesarean section operation(t =8.58,6.38,P ＜ 0.05).And none of the cases took the hysterectomy or occured DIC.In the conventional treatment group,the blood loss was more,the operation time was longer,and 6 cases took the hysterectomy,5 cases occured DIC.The two groups were significantly different(x2 =6.98,4.59,all P ＜0.05).Conclusion In the cesarean section,if refractory hemorrhage happen and the conventional measures does not work,the improved B-Lynch suture should be taken into consideration.It has good hemostatic effect.