Objective:To investigate the effect of diversified health education based on the Knowledge-Attitude-Practice (KAP) model on treatment compliance and oral health status in adolescent patients wearing removable orthodontic appliances.Methods:Thirty patients were randomly allocated to a control group and an experimental group. The control group received conventional health education, while the experimental group received diversified education based on the KAP framework, including videos, handbooks, interactive demonstrations, and telephone follow-ups. Dental arch morphological parameters and Oral Health Assessment Tool (OHAT) scores were measured before and after the intervention.Results:Post-intervention, the experimental group showed significantly greater improvement in all dental arch morphological parameters compared to the control group (P<0.001). Additionally, the experimental group had a significantly lower OHAT score than the control group [(3.75±1.22) vs (8.25±1.08), P<0.05], indicating better oral health.Conclusion:Health education grounded in the KAP theory can systematically enhance treatment compliance and improve oral health in adolescent patients with removable orthodontic appliances, demonstrating value for clinical dissemination.