Objective: To investigate the clinical effect of unprotected perineum delivery technique.Methods: 200 cases under natural labor were randomly divided into control group and observation group, 100 cases in each group. The control group adopted routine delivery and the observation group received unprotected perineum delivery technique. The perineal incision rate, time of labor, degree of perineal laceration, postpartum hemorrhage rate, neonatal asphyxia rate, postpartum perineal pain, maternal hospitalization time, satisfaction and hospitalization cost were compared between the two groups.Results: There was no significant difference of time of labor in the two groups (P＞0.05). The incidences of perineal laceration, incision and shoulder dystocia in observation group were significantly higher than those in control group (P＜0.05). The perineal intactness rate in observation group was significantly higher than that in control group (P＜0.05). There was no significant difference in the incidence of postpartum hemorrhage and neonatal asphyxia between the two groups (P＞0.05). The maternal satisfaction rate in observation group was significantly higher than that in control group (P＜0.05) and the hospitalization time was shorter than that in control group (P＜0.05). The score of maternal perineal pain on the 3rd day in observation group was significantly lower than that in control group (P＜0.05). There was no significant difference in the hospitalization cost between the two groups (P＞0.05).Conclusion: Unprotected perineum delivery technique can reduce the rates of shoulder dystocia, postpartum hemorrhage and perineum incision, relieve postpartum pain in the perineum, improve the satisfaction of nursing mothers, and shorten the hospitalization time. It is worthy of clinical promotion.