Objective To investigate the impact of optimized preoperative fasting scheme for gynecological day surgery with general anesthesia. Methods We retrospectively selected 639 patients undergoing gynecological day surgery with general anesthesia between June 2021 and August 2021 in the day surgery department of West China Second University Hospital of Sichuan University as the control group, and 920 patients undergoing gynecological day surgery with general anesthesia in the same hospital between November 2021 and February 2022 as the observational group. The patients in the control group were treated with routine preoperative fasting scheme, and the ones in the observational group were treated with optimized preoperative fasting scheme. The differences in preoperative duration of water deprivation, intraoperative and postoperative incidences of aspiration, and postoperative first anal exhaust time between the two groups were compared. Results The preoperative duration of water deprivation in the control group was longer than that in the observational group [(12.49±2.63) vs. (6.69±2.76) h, P<0.05]. The incidences of intraoperative and postoperative aspiration were both 0. The postoperative first anal exhaust time in the control group was later than that in the observational group [(11.51±6.58) vs. (8.19±4.13) h, P<0.05]. Conclusions For patients undergoing gynecological day surgery with general anesthesia, the implementation of the optimized preoperative fasting scheme can effectively shorten the preoperative duration of water deprivation, without increasing the risk of anesthesia. It can accelerate the recovery of intestinal function for gynecological laparoscopic day surgery with general anesthesia, promote the implementation of enhanced recovery after surgery, and improve the efficiency of day surgery.