Objective: To investigate the effect of oral carbohydrates 2 h before operation on early breastfeeding after elective cesarean section. Methods: Eighty primiparas undergoing selected cesarean section were randomly divided into an observation group and a control group, with 40 cases in each group. In the control group, no drink was given during the period of 8 hours before the operation, and 400 mL of 12.5% carbohydrate was taken in the observation group 2 hours before the surgery. The level of thirst, hunger, and anxiety were evaluated by Visual Analogue Scale (VAS) at 3 h, and 30 min before operation. The insulin resistance index and prolactin was detected at the time points at 3 hours before operation and 1 day after operation. The first successful breastfeeding time, and the number and duration of breastfeeding in 24 h after operation were recorded and compared. Results: The VAS score of thirsty, hunger, and anxiety in the observation group was significantly lower than the control group (P<0.01). The postoperative homeostasis model assessment-insulin resistance (HOMA-IR) index was significantly lower, and the postoperative prolactin was significantly higher in the observation group (P<0.05). The first successful breastfeeding time in the observation group was significantly earlier than the control group, the frequency and duration of breastfeeding during the postoperative 24 h were significantly greater than the control group (P<0.01). Conclusion: Oral carbohydrate 2 hours before elective cesarean section can reduce the physiological and psychological stress, alleviate the perioperative subjective discomfort and insulin resistance, and improve the quality of early breastfeeding.