To investigate the effects of the neuromuscular electrical stimulation (NMES) combined with massage for treating women after cesarean section on their postpartum lactation function, breastfeeding, and serum prolactin level. Methods: A total of 196 women after cesarean section were selected and were randomly divided into two groups (98 cases in each group) from January 2020 to December 2022. The women in the control group were given massage intervention for 5 days continuously, and the women in the experimental group were given intervention of NMES combined with massage. The initial time of lactation, the breast filling time, and the lactation volume in 48 hours after delivery of the women in the two groups were recorded. The score of visual analogue scale (VAS) of breast distending pain and the serum prolactin level of the women at 24 h, 72 h, and in 5 d after delivery, and the breastfeeding status and the neonatal body mass in 42 days after delivery in the two groups were also recorded. Results: The initial time of lactation and the breast filling time of the women in the experimental group were significantly shorter than those of the women in the control group, and the lactation volume of the women at postpartum 48h in the experimental group was significantly more than that of the women in the control group (P<0.05). The score of breast tenderness of the women in the experimental group at postpartum 72h (2.56±0.42 points) or in postpartum 5d (1.71±0.42 points) was significantly lower than that (3.46±0.57 points or 2.41±0.49 points) of the women in the control group. The success rate of breastfeeding (92.9%) of the women in the experimental group in postpartum 42d was significantly higher than that (77.6%) of the women in the control group. The neonatal body mass (5.89±1.08 kg) in the experimental group was significantly higher than that (5.24±0.99 kg) in the control group (all P<0.05). Conclusion: NMES combined with massage for treating the women after cesarean section can up-regulate their postpartum serum prolactin level, and can promote their early lactation.