Abstract: Objective To compare the changes of condylar position in joint fossa of Angle classⅡdeep overbite malocclusion adult patients treated by removable bite plate． Methods Thirty adult patients aged 18-32 years with Angle class Ⅱ malocclusion treated in our hospital were included in this study． CBCT examination was performed, and three-dimensional (3D) images were reconstructed, QR-NNT programs were used to measure anterior, superior and posterior joint spaces． Then the position of condyle in the glenoid fossa was calculated by Pullinger analysis methods． Removal maxillary bite plate was used to raise the anterior teeth bite of the Angle classⅡmalocclusion patients． After raising the anterior teeth bite and establishing posterior teeth stable occlusion, all patients were scanned by CBCT again． Data， including joint space and condylar position before and after treatment, were compared by statistical software． Results After raising the anterior teeth bite, the anterior joint space decreased (2．16±0．13) mm vs (2．03±0．19) mm, P< 0．000 1), the superior joint space (2．81±0．32) mm vs (3．30±0．33) mm, P< 0．000 1) and posterior joint space (2．68±0．41) mm vs (2．97±0．42) mm, P=0．000 3) increased significantly． Conclusion After raising the anterior teeth bite of the Angle class Ⅱ malocclusion by removale bite plane, the condylar position in the fossa has the trend of moving forward．