[Objective] To investigate the relationship between the main curvature and segmental curvature of scoliosis in children with congenital hemivertebra deformity [Methods] The imaging data of children with hemivertebra deformity treated in the third affiliated Hospital of Zhengzhou University from January 2015 to December 2018 were retrospectively analyzed.Measure and compare the segmental curvature, main curvature, segmental kyphosis angle in standing full-length spine radiographs（X-ray），whole spine computed tomography (CT) and total spine magnetic resonance imaging (MRI) in supine position.[Results] The main curvature of X-ray image was 5.96° ±4.98° larger than that of CT image. the main curvature of X-ray image was 6.17°±5.58°larger than that of MRI image. The difference of main curvature between X-ray and CT, X-ray and MRI was statistically significant, and there was a linear correlation. There was no significant difference in the main curvature between CT and MRI.There was no significant difference in segmental curvature and kyphosis angle among the three imaging methods. [Conclusion] Segmental curvature does not change with the change of position. Segmental curvature can truly reflect the degree of the deformity. Segmental curvature can be used to evaluate the degree of hemivertebra deformity in children who can’t standing.The Angle of the main curvature of the standing full-length spine radiographs can be estimated by main curvature of the supine position.