Abstract:The structure of maxillofacial bone in human bones is relatively complicated, and it is difficult to repair after injury.The poor effect of traditional surgical repair depends mostly on the experience and technical level of the surgeon. Therefore, through medical 3D modeling software, the 2D image is generated into an intuitive 3D model, and on this basis, preoperative simulation is performed, and the reconstruction and repair model of the maxillofacial defect area is generated using technical modules such as rotation, translation, mirroring, and Boolean operation. Immediately 3D printing technology is used to produce a 1∶1 isometric 3D maxillofacial defect model and repair model, the 3D printing model is used to formulate the surgical plan and perform preoperative simulation or pre-bending the implanted titanium plate, and individualized solid repair model can guide the operation, greatly improve the accuracy and stability of the operation, and improve the effect of the operation.