Objective To explore the effect of spa with free position on parturition of primipara.Methods One hundred and thirty-eight primiparas were equally randomized into control group and observation group. The control group conducted Doula delivery,which means a delivery at recumbent or semi-recumbent position when mouth of the uterus opened by 3 cm and the primiparas in the observation group took free position with spa based on Doula delivery. The two groups were compared in terms of the durations of each labor and total labor, postpartum bleeding 2 h after delivery and neonatal Apgar score,delivery way,pains,anxiety and feeling of control at delivery.Results The postpartum bleeding in the observation group was significantly lower than that in the control group(P<0.05). The durations of first labor, second labor and total labor in the observation group were all significantly shorter than those of the control. The degrees of pain and anxiety were lower than those of the control group,while the control sense at delivery was better than that of the control group(P<0.05,for all). There were no differences in the rate of spontaneous delivery,the rate of uterine-incision delivery,the rate of episiotomy and scores on 1 min Apgar scales(P>0.05).Conclusion Aided delivery by spa with free position can reduce labor pain and anxiety levels,improve the birth control and comfort and ultimately enhance the sense of delivery control and comfort.