Objective To analyze the effect of cosmetic suture technique in patients with maxillofacial trauma. Methods A total of 80 patients undergoing maxillofacial trauma plastic surgery admitted to our hospital from June 2023 to June 2024 were selected as the research subjects. According to the red and blue envelope method, they were divided into the control group and the observation group, with 40 patients in each group.The control group was treated with conventional debridement suture, and the observation group was treated with cosmetic suture. The healing effect, scar condition, quality of life and clinical related indicators were compared between the two groups. Results The total effective rate of healing in the observation group was 97.50%, which was higher than 85.00% in the control group (P <0.05). The scores of wound col or, thickness, softness and blood vessel distribution in the observation group were lower than those in the control group (P <0.05). The scores of psychological function, material life, social function and physical function in the observation group after surgery were all higher than those in the control group (P <0.05). The suture removal time, wound healing time, edema time and operation time in the observation group we re all shorter than those in the control group (P <0.05). Conclusion In the maxillofacial trauma plastic surgery, cosmetic suture technique can reduce the risk of scar formation and complications on the one hand, and on the other hand, it can also improve patients’ quality of life and contribute to the improvement of incision aesthetics.