Objective To investigate the effect of leonurus Injection in the prevention of puerperal hemorrhage（for delivery to the newborn within 2 hours post-partum） and postpartum hemorrhage（post-natal rest of the time）.Method 300 cases of birth mothers were randomly divided into 3 groups

100 cases in each.leonurus group used a simple liquid leonurus injection treatment

oxytocin group used a simple liquid oxytocin injection treatment

and leonurus+oxytocin group used reduced injection leonurus oxytocin treatment.The postpartum hemorrhage

hemorrhagic volume

and the situation of uterine involution between the 3 groups were compared.Results For the puerperal hemorrhage

the leonurus+oxytocin group was less than the oxytocin group or the leonurus group（P<0.05）;for the postpartum hemorrhage

the leonurus+oxytocin group and the leonurus group was significantly lower than oxytocin group（P<0.05）.Involution in the uterus

in day 3 and day 5

the height of the uterine of leonurus group is lower than that of oxytocin group.Conclusion Leonurus injection significantly promotes contraction

and promotes the role of uterine involution.Leonurus injection combined with oxytocin production contributes to the prevention of puerperal hemorrhage and postpartum hemorrhage.