In order to explore the application effect of autologous fat granule transplantation in augmentation rhinoplasty for patients with low nasal root, 42 patients with low nasal root admitted to our hospital from April 2020 to May 2022 were selected as the research objects, and autologous fat granule transplantation was adopted for augmentation rhinoplasty. The nasal frontal angle before and after operation was compared, and the patients' satisfaction with plastic surgery and the incidence of adverse reactions were counted. The results showed that the nasal frontal angle was (136.24±2.76)° after 12 months of operation， which was greater than (122.13±2.87)° before operation, and the difference was statistically significant (P