At present, our hospital carries out repair of cranial defects caused by various reasons and adopts three-dimensional reconstruction technology to perfectly restore the original shape. 1.Pre-operative computer simulation 3D reconstruction imaging to recover the previous cranial shape. 2.Simulation imaging of titanium plate recovery after repair 3.Postoperative X-ray can clearly see that the recovered skull fits perfectly with the original skull, and the shape is beautiful and symmetrical, and the complications of loosening of titanium plate in the long term are significantly reduced compared with the previous non-plastic repair.