Abstract: Data modeling in reverse engineering is one of key technologies to realize RP. According to the 2D information of CT image, the edge contour was extracted by the image segmentation and binary image processing. Then the 3D CAD model was reconstructed. 3D physical model was made by reconstructing the 3D CAD model, converting into standard data for RP. It has wide application in the biomedicine domain. Based on the state of the study, the process of CT image reverse model and its application on RP were discussed.