Objective To compare the effects of invisible appliance and fixed appliance on periodontal health in orthodontics patients. Methods A total of 88 patients who underwent orthodontics treatment in the Department of Stomatology, Guangzhou Noah Regent Clinic from August 2023 to December 2024 were selected as the research subjects. According to different correction methods, they were divided into the reference group and the observation group, with 44 patients in each group. The reference group was corrected with fixed appliance, and the observation group was corrected with invisible appliance. The periodontal health, masticatory function and quality of life were compared between the two groups. Results After correction, the PLI, GI and SPD in the two groups were lower than those before correction, and those in the observation group were lower than those in the reference group, and the differences were statistically significant (P<0.05). The masticatory efficiency of the observation group after correction was (79.62±7.71)%, which was higher than (73.44±8.05)% of the reference group, and the difference was statistically significant (P<0.05). The OHIP score in the two groups after correction was lower than that before correction, and that in the observation group was lower than that in the reference group, and the difference was statistically significant (P<0.05). Conclusion Both invisible appliance and fixed appliance can improve the oral function and quality of life of orthodontics patients, but invisible appliance is more effective in improving oral function and maintaining periodontal health, and the improvement of patients' quality of life is more definite.