Objective To investigate the effect of brace treatment on adolescent idiopathic scoliosis（AIS） to provide evidence for related studies. Methods A total of 39 patients with AIS admitted to the Outpatient Clinic of Gansu Provincial Hospital of TCM from January 2018 to December 2021 were selected as the study subjects. All subjects received brace treatment. Full-length anteroposterior and lateral radiographs of the spine were selected at initial diagnosis and the last follow-up and the Cobb angle at initial diagnosis and the last follow-up were measured. The type of scoliosis

Risser’s sign rating

and Ycartilage closure at initial diagnosis were identified. Results Of all cases

31 cases（79.49%） were effective and 8 cases（20.51%） were ineffective. Conclusion Brace treatment on AIS can delay the progression of lateral bending and improve the angle of lateral bending

which serves as an effective conservative treatment.