Objective To investigate the effect of spaced relaxation technique on delivery process of primiparas. Methods Healthy primiparas planning a natural labor were divided into a spaced relaxation training group if they intended to receive non-drug analgesia （n=235）, and a PCEA group （n=294） if they intended to receive patient-controlled epidural analgesia (PCEA).Since 2 cm dilation of the uterine orifice was achieved, the former group was given spaced relaxation training, while the latter group received analgesics by the intraspinal routes.The delivery process, delivery outcome and delivery experience among the 2 groups were observed. Results There were significant before-after changes in the time interval of a single birth pang and time interval of heart rate increase during a single birth pang in each group; there were also significant changes in the above-mentioned 2 outcome measures after intervention between the 2 groups （P＜0.05,P＜0.01）.The spaced relaxation training group saw significantly higher VAS pain scores, labor comfort scores, and shorter duration of labor after intervention, than the PCEA group （P＜0.01 for all）; the former group also had lower proportions of oxytocin administration and assisted vaginal birth than the latter group （P＜0.05,P＜0.01）. Conclusion Spaced relaxation technique helps lessen birthing pain, shorten the duration of labor, reduce obstetric intervention, and increase the comfort level of child birthing women.