Objective To discuss the effect of inhaling laughing gas and epidural anesthesia on reducing and relieving labor pain,and their influence on delivery process,mode and on newborns.Methods 190 cases were divided into three groups,group A: inhaling laughing gas group,group B:epidural anesthesia(CSEA) group and group C:without any analgesia,as control group. Observation and studing the degree of labor pain,delivery process,delivery ways,Apgar score,hemorrhage volume of delivery period,rate of postpartum hemorrhage among the three groups.Results Both the two kinds of analgesic methods(group A and group B) were effective in relieving labor pain.The method of inhaling laughing gas shorted the delivery process(P