Objective To explore the effect of integrated nursing based on the behavior change theory on the self-behavior management of patients undergoing plastic and reconstructive surgery for facial scar. Methods A total of 60 patients who underwent plastic and reconstructive surgery for facial scar and were admitted to our hospital from October 2021 to December 2024 were selected as the research subjects. According to the random number table method, they were divided into the control group and the observation group, with 30 patients in each group. The control group received conventional nursing, and the observation group received integrated nursing based on the behavior change theory on the basis of the control group. The self-behavior management, self-acceptance degree, psychological state and coping style were compared between the two groups. Results After intervention, the scores of management behavior, restrictive behavior, psychological activity and state activity in the observation group were higher than those in the control group (P<0.05). After intervention, the score of BIRS in the observation group was lower than that in the control group, and the score of SAQ in the observation group was higher than that in the control group (P<0.05). After intervention, the scores of HAMD, HAMA and MSSNS in the observation group were all lower than those in the control group (P<0.05). After intervention, the scores of avoidance and yielding in the observation group were lower than those in the control group, and the score of facing in the observation group was higher than that in the control group (P<0.05). Conclusion The application of integrated nursing based on the behavior change theory in patients undergoing plastic and reconstructive surgery for facial scar is helpful to improve the self-behavior management ability and self-acceptance of patients, improve their psychological state and coping style, and enhance the nursing experience during the perioperative period.