Objective To observe the effect of"one-to-one"full-course Doula accompanied delivery on the outcome of puerperants in obstetric departments.Methods Totally 2120 normal full-term puerperants were taken as the observation group.The puerperants in the observation group were accompanied one-to-one for the full course by a maternity nurse who offered services on physiology,psychology and emotion,social adaptative ability,etc.to the puerperants.Totally 2132 normal full-term puerperants were taken as the control group.Results In the observation group,the psychological state was relatively stable,the painful degree Was mild,the incidence rate of postpartum hemorrhage Was low,the rate of uterine-incision delivery Was low,the delivery course was short,the Apgar score of neonates was high,the apnoea is less(P＜0.05),and the satisfactory degree of the puerperants was high.Conclusion The service mode of"one-to-one"full-course Doula accompanied dehvery in obstetric departments is helpful for the health of both mothers and infants,and is good for improving the entire nursing quality and for improving the satisfactory degree.The"one-to-one"full-course Doula accompanied delivery is a good service mode.