Objective To investigate the risk factors of premature rupture of membranes and its influence on maternal and infant complications ,and provide guid-ance for clinical work.Methods retrospective analysis of 196 cases of 2011-2013 in our hospital of Obstetrics and gynecology were premature rupture in patients with clinical data,and selected the normal period of delivery in hospital without premature rupture of membranes and other maternal complications in 196 cases as control group,compared two groups of mode of delivery and maternal fetal complication rate,and the risk analysis of premature rupture of membranes factors of.Results prema-ture rupture of membrane group,the incidence of dystocia cesarean section was higher than that in the control group,the difference was statistically significant(P<0.05);maternal infection rate was significantly higher infection rate and newborn,the difference was statistically significant(P<0.05).Conclusion the pa-tients with the incidence of dystocia and mother infant complications were higher than normal pregnant women were elevated ,premature rupture of membranes,timely treatment,early treatment,reduce maternal complications,improve birth outcomes.