Objective  To research the morphological classification of inferior angle of scapula based on CT 3D reconstruction and its clinical significance.    Methods  A total of 290 scapular bones data were collected from People’s Hospital of Lu Xian County and measured based on CT 3D reconstruction.The scapular bones images were reconstructed by CT 3D technique.Reference points: g was the inferior scapular angle, n was the inferior glenotubular nodule, m was the intersection of the scapular ganglion and the medial edge of the scapula, k was the upper scapular angle, r was the notch of the scapular glenoid, h was the intersection of point g to mr. The parameters of inferior angles of 290 scapular bones, including the thickness of point g (the thickest part of inferior angle of the scapula), the length of the line gn, line gm, and line gh, and the angle of ∠ngm, ∠gmk (the projection of the scapular coronal plane), and ∠gmk’(the projection of the scapular sagittal plane) were observed and measured by CT 3D technique.    Results  Under the CT three-dimensional reconstruction, the inferior angle of scapula was classified into three types: accessory angle-type (175, 60.34%), U-type (81, 27.93%) and V-type (34, 11.73%). In addition, there was a significant difference between the auxiliary angle type and the Ⅴ type on the thickest part of the g point and gn (P<0.05); U-type and V-type with paragonal gm-significant difference (P<0.05); There was a significant difference between the auxiliary angle type and the U shape on gh (P<0.05); there was a significant difference between the auxiliary angle type and the U shape on ∠gmk’ (P<0.05). There was a significant difference in the inferior angle of the bilateral scapula on mngm (P<0.05).    Conclusion  Based on the result  of CT three-dimensional reconstruction, the inferior angle of scapulae have three anatomical types, with the accessory angle-type as the main type, and the morphology and classification of it are of certain clinical implication.