Objective To explore the effect of uterine contraction level during patient controlled epidural analgesia (PCEA) on stages of labor and birth outcomes, and to provide reference and guidance for clinical work. Methods Women demanding PCEA during labor were divided by the uterine contraction levels into a weak contraction group ［uterine contraction＜200 Montevideo （MU）, 169 cases］ and a strong contraction group （uterine contraction＞200 MU, 188 cases）.Progress of labor were observed in the 2 groups. Results The VAS and MU values in the 2 groups immediately before, 30 minutes and 60 minutes after PCEA had significant diffe-rences between the 2 groups （all P＜0.01）.The length of latency, the duration of the active period,the Apgar scores of the newborn, the rate of Cesarean section, rates of second and third degree amniotic fluid, rates of oxytocin use, and forceps delivery had significant differences between the 2 groups （P＜0.05,P＜0.01）. Conclusion The higher the level of uterine contractions during PCEA intervention, the lesser the impact on the duration of labor and birth outcomes. It is recommended in clinical work that ute-rine contraction level should be considered in a PCEA decision.