Objective To explore the effect of modiffed cosmetic suture technique on wound healing and scar formation in patients with facial skin and soft tissue injury. Methods A total of 60 patients with facial skin and soft tissue injury who were treated in the Department of Plastic Surgery of our hospital from January 2023 to September 2025 were selected, and they were divided into the control group and the observation group by the random number table method, with 30 patients in each group. The control group was treated with conventional suture technique, and the observation group was treated with modiffed cosmetic suture technique. The wound healing, scar formation and satisfaction rate of facial morphology and function were compared between the two groups. Results The primary healing rate of the observation group was higher than that of the control group, the secondary healing rate was lower than that of the control group, and the healing time was shorter than that of the control group (P<0.05). The scar width in the observation group was smaller than that in the control group, and the scores of each dimension and total score of VSS were lower than those in the control group (P<0.05). The satisfaction rate of facial morphology and function in the observation group (96.67%) was higher than that in the control group (80.00%) (P<0.05). Conclusion The application of modiffed cosmetic suture technique in patients with facial skin and soft tissue injury has a good effect. It can improve the quality of wound healing, reduce scar formation, and help to improve the satisfaction rate of facial morphology and function, with deffnite clinical application value.