Objective To explore the effect of temperature management on pain intensity in patients undergoing liposuction plastic surgery under general anesthesia. Methods A total of 80 patients undergoing liposuction plastic surgery under general anesthesia in Shenzhen Jumei Boyue Medical Beauty Clinic from January 2023 to December 2024 were selected as the research subjects, and they were divided into the control group and the observation group by the random number table method, with 40 patients in each group. The control group received conventional heat preservation, and the observation group received temperature management on the basis of the control group. The incidence of intraoperative hypothermia and postoperative shivering, core body temperature, pain intensity, comfort level and surgical related indicators were compared between the two groups. Results The incidence of intraoperative hypothermia and postoperative shivering in the observation group was lower than that in the control group (P <0.05). The core body temperature of the observation group at 30 min, 60 min after the start of surgery and at the end of surgery was higher than that in the control group (P <0.05). The VAS score of the observation group was lower than that of the control group (P <0.05). The GCQ score of the observation group was higher than that of the control group (P <0.05). The anesthesia recovery time and intubation duration of the observation group were shorter than those of the control group (P <0.05). Conclusion The application of temperature management strategy in liposuction plastic surgery under general anesthesia can effectively maintain the stability of patients' perioperative core body temperature, reduce the incidence of intraoperative hypothermia and postoperative shivering, and help to shorten intubation duration, relieve postoperative pain and improve comfort level, thereby promoting patients' anesthesia recovery.