A total of 50 patients who received oral cosmetic repair in our hospital from April 2021 to April 2022 were selected as the research objects. All patients were treated with light-cured composite resin. They were followed up for 1 year after repair. The repair effect, complications and teeth after repair were observed, and the application effect of light-curing composite resin in oral cosmetic repair was explored. The total effective rate of repair in 50 patients was 98.00%, and the incidence of complications was 2.00%. The aesthetics, functionality and practicability of the teeth were improved 6 months after repair. Therefore, it can be seen that the application of light-curing composite resin in oral cosmetic repair has a good effect, which can effectively reduce the incidence of complications and improve the beauty and function of patients' teeth.