Objective To explore the effect of applying free positioning to primiparous women during labor analgesia for correcting abnormal fetal positions. Methods Full-term in-labor primiparas with abnormal fetal position were selected and divided into 2 groups according to the time of admission. The control group (n=104) was subjected to routine supine positioning or semi-sitting positioning during labor, while the intervention group (n=129) was subjected to free positioning. The rates of fetal position correction and oxytocin use, the mode of delivery, the duration of second stage of labor and all stages of labor, and the vaginal blee-ding volume within 2 h postpartum ,the incidence rate of perineal injury, and neonatal Apgar score were compared between the two groups. Results The rate of fetal position natural correction in the intervention group was significantly higher than that in the control group；the mode of delivery had significant difference between the 2 groups (both P<0.05). The rates of oxytocin use and perineal injury, the duration of labor stages, the vaginal bleeding volume within 2 h postpartum, and neonatal Apgar score had no significant differences between the 2 groups (all P>0.05). Conclusion Free position delivery can effectively correct abnormal fetal position, boost a natural birth, and improve adverse pregnancy outcomes.