Abstract: Objective To evaluate the heights of the maxillary anterior alveolar bones with skeleton malocclusion by CBCT.Methods Sixty patients with skeleton malocclusion were divided into 3 groups， with 20 patients in each group: 20 cases with skeleton malocclusionⅠ（group 1 ）, 20 cases with skeleton malocclusionⅡ（group 2）, 20 cases with skeleton malocclusion Ⅲ（group 3）.Collect craniofacial Dicom data by CBCT. The CT images were constructed into 3D models by using medical image processing software Dolphin Imaging 11.0. We surveyed the heights of the maxillary anterior alveolar bones. The measurements were analyzed statistically.Results The heights of the central incisive alveolar bones had no significant differences among the three groups. The heights of alveolar bones between maxillary central incisors and lateral incisors as well as those between maxillary lateral incisors and canine teeth had significant differences between group 1 and group 3, group 2 and group 3.Conclusions In patients with the three kinds of skeleton malocclusion, there is no statistical difference in heights of maxillary anterior alveolar bones in central incisive areas. The heights of the mesial and distal lateral incisive alveolar bones are not the same in patients with the three kinds of skeleton malocclusion.