Abstract: Objective To study the effects of water birth in deep water level on maternal and newborns. Methods One hundred and thirty-two primiparous women adopting water birth in our hospital from April, 2014 to May, 2016 were divided into low water level group (62 cases) and deep water level group (70 cases) according to the level of water level during delivery, water level to the waist in the low water level group, and water level to the chest in the deep water level group, and choose the same period in our hospital for routine delivery of maternal 65 cases, recorded as the control group, comparison of the threegroups of total stage of labor, 24 h bleeding volume, perineal injury and pain, at the same time, the Apgar score was used to evaluate the newborns health status and the newborns NICU occupancy rate and newborns infection rate were recorded. Results There was no significant difference in blood loss between the three groups (P>0.05), there was statistically significant in total labor and perineum injury between the three groups (P<0.05), the total stage labor of the deep water level group was significantly lower than that of the low water level group and control group (P<0.05), the total stage labor of the low water level group was significantly lower than that of the control group (P<0.05), the degree of perineum injury in the deep water level group was significantly lower than that in the low water level group and control group (P<0.05), the degree of perineum injury in the low water level group was significantly lower than that in the control group (P<0.05). Seventeen cases of grade Ⅰ pain, 33 cases of grade Ⅱ pain, 16 cases of grade Ⅲ pain, 4 cases of grade Ⅳ pain in the deep water level group, 6 cases of grade Ⅰ pain, 17 cases of grade Ⅱ pain, 31 cases of grade Ⅲ pain, 8 cases of grade Ⅳ pain in low water level group, 4 cases of grade Ⅰ pain, 10 cases of grade Ⅱ pain, 24 cases of grade Ⅲ pain, 27 cases of grade Ⅳ pain in low water level group, the degree of pain in the deep water level group was significantly lower than that in the low water level group and control group(P<0.05), the degree of pain in the low water level group was significantly lower than that in the control group (P<0.05); There was no significant difference in Apgar scores between the three groups at 1 min and 5 min (P>0.05), and there was no significant difference between the threegroups in NICU occupancy rate and neonatal infection rate (P>0.05). Conclusion Deep water level in the delivery of water is better than low water level in childbirth, can significantly shorten the labor, reduce the degree of perineal injury, reduce maternal pain, and no serious adverse effects on neonatal.