Objective To investigate the therapeutic effect of platelet-rich plasma combined with autologous fat in labia majora filling surgery．Methods From January to December 2021,23 female patients,aged 23-59,with an average age of（45.23±1.42）,were admitted to the Plastic Surgery Department of the First Affiliated Hospital of Nanchang University,hoping to improve the appearance of the labia major through autologous fat transplantation technology．According to the results of preoperative communication with the patient,platelet-rich plasma and adipocytes were mixed and injected to fill the labia majora．GAIS evaluation scale,Likert evaluation scale and FSFI questionnaire were used to evaluate the surgical effect．Results The injection amount of each side of labia majora in all patients was 20~35 mL,the immediate postoperative effect was very satisfactory,and there were no postoperative complications such as infection and hematoma．After 6 months of follow-up,all patients' labia majora morphology met the aesthetic standard．GAIS evaluation results showed that the complete improvement rate was 82.61%,the obvious improvement rate was 13.04%,and the mild improvement rate was 4.35%．The satisfaction of labial postoperative results showed that 86.96% of patients were very satisfied and 13.04% were satisfied,no dissatisfied or very dissatisfied．Six months afterwards,the patients' mean total FSFI score（53.81）was significantly higher than that of preoperation（31.8,P<0.001）．Conclusions Platelet-rich plasma combined with autologous fat injection can correct the labia majora volume defect and obtain satisfactory clinical effect．