In order to facilitate the doctor to obtain information more comprehensively and operate accurately from a three-dimensional perspective in interventional therapy, the paper uses a multi-view stereo reconstruction algorithm for three-dimensional reconstruction of medical implants in vitro. The effects of shooting and environmental conditions on reconstruction time and effect were analyzed. We use the convenient shooting device to colect multi-view images of the stent and open source software to acquire the point cloud data. By using reverse engineering software, the point cloud is processed interactively and the surface is generated. Eventualy, the 3D model of the implant is reconstructed, which can be used for industrial production.