Objective To analyze the effect of modified Brent method otoplasty on postoperative complications in patients with ear deformity. Methods A total of 80 patients with ear deformity caused by acquired injury factors admitted to our hospital from January 2021 to August 2022 were selected. According to different operation methods, they were divided into the control group and the observation group, with 40 patients in each group. The control group was treated with expanded skin flap combined with autologous ear cartilage transplantation, and the observation group was treated with modified Brent method otoplasty. The operation time, repair effect, complications and patient satisfaction were compared between the two groups. Results The total operation time in the observation group was shorter than that in the control group (P <0.05). The excellent and good rate of repair effect in the observation group (97.50%) was higher than that in the control group (82.50%) (P <0.05). The incidence of complications in the observation group (2.50%) was lower than that in the control group (22.50%) (P <0.05). The patient satisfaction rate in the observation group (97.50%) was higher than that in the control group (85.00%) (P <0.05). Conclusion Modified Brent method otoplasty can improve the repair effect of patients with ear deformity, reduce the incidence of postoperative complications, and enhance patients’ satisfaction with the repair effect.