Objective To compare the different concentrations of ropivacaine combined with fentanyl infusion analgesia labor in walking labor analgesia in maternal BP,HR,SpO2,labor,fetal heart,uterine contractions and oxytocin usage and the visual analogue scale (VAS) and maternal motor nerve block.Methods 180 cases of primipara volunteered for labor analgesia,ropivacaine with different concentration of patient controlled epidural analgesia (PCEA),and compared with parturients without analgesia,were randomly divided into group A,group B and group C with 60 cases in each group,three groups were respectively injected into the epidural 0.075％ ropivacaine and fentanyl 2 μ g/ml (group A,n=60),0.125％ ropivacaine plus fentanyl 2 μ g/ml (group B,n=60),0.20％ ropivacaine and fentanyl 2 μ g/ml (group C,n=60).With the cervix opening to the 2-3 cm,L2-3 epidural cephalad catheter,injection of 0.8％ lidocaine,5 mins to the load of 8-10 resistant analgesic liquid,confirming the analgesic plane,pain significantly reduced with analgesia pump.Continuous infusion of 6-8 ml,a single push volume of 3 ml,interval time of 15 min,wide open withdrawal.Results The results of three groups of maternal analgesia labor walk at each time point after VAS score was significantly lower with significant difference (P ＜ 0.05); feasible implementation of labor analgesia in group A,group B motor nerve block,in class 0,grade 1,2 cases of group C,and the difference was statistically significant (P ＜ 0.05);additional anesthesia compound liquid of three groups had no significant difference (P ＞ 0.05); there was no significant difference between three groups of maternal mode of delivery and use of oxytocin and neonatal Apgar score (P ＞ 0.05).Conclusion 0.125％ ropivacaine + fentanyl was 2 μg/ml continuous infusion for labor analgesia when walk good analgesic effect,motor nerve block light,is worth the clinical promotion.