Objective To analyze the clinical effect of minimally invasive cosmetic suture technique in maxillofacial trauma repair. Methods From August 6, 2022 to March 6, 2024, a total of 57 patients with maxillofacial trauma admitted to Gaolan Port Hospital, the Fifth People' s Hospital of Zhuhai were selected as the research subjects, and they were divided into the traditional group (n =28) and the new group (n =29) by the random number table method. The traditional group was treated with conventional debridement suture treatment, and the new group was treated with minimally invasive cosmetic suture technique on the basis of the traditional group. The primary healing rate, scar condition [scar hyperplasia rate, scar severity (VSS score) and wound healing appearance (POSAS) score], satisfaction, and psychological condition [self-rating anxiety scale (SAS) and self-rating depression scale (SDS)] were compared between the two groups. Results The primary healing rate of the two groups was 100.00%, and the difference was not statistically significant (P >0.05). The scar hyperplasia rate, VSS and POSAS scores of the new group were lower than those of the traditional group, and the difference were statistically significant (P <0.05). The total satisfaction rate of the new group was higher than that of the traditional group, and the difference was statistically significant (P <0.05). After surgery , the SAS and SDS scores of the new group were lower than those of the traditional group, and the difference were statistically significant (P <0.05). Conclusion In the process of maxillofacial trauma repair, minimally invasive cosmetic suture technique has a positive effect on the primary healing rate, scar hyperplasia, wound healing appearance, patient satisfaction and psychological status.