Abstract: With the boost of orthodontics,some side effects during orthodontic treatment have raised clinician’s attention .But due to the variety of the shape、height and thickness of the alveolar bone and ability of remodeling, the accurate prejudice of changes of alveolar bone after orthodontic treatment is still a challenge.A high quality CBCT technique is well suited for research on alveolar bone changes during orthodontic treatment as it provides access to anatomic structures that cannot be evaluated in conventional radiographs, high measurement accuracy and precision.This review tracks the mechanics of alveolar bone remodeling and the changes of alveolar bone during orthodontic assessed by CBCT