Cranial defects are a common disorder in neurosurgery, as the skull can be damaged by external force majeure. For example, traffic accidents, production safety accidents, falling objects, fights, cranial surgeries, etc. may damage the skull and eventually cause cranial defects. This requires timely cranial repair surgery. Cranial repair surgery is a routine surgery often needed in neurosurgery. Skull repair surgery techniques are becoming more and more sophisticated, and the repair materials are being updated and improved. From the beginning of pile plate and metal plate, to later plexiglass, bone cement, silicone, etc. To the current commonly used titanium mesh and PEEK materials, along the way, the material performance is getting better and better, and the restoration results are becoming more and more ideal. Currently, polyetheretherketone is a cranial repair material with excellent performance and relatively good results, and is favored by neurosurgeons and most patients with cranial defects. Polyetheretherketone is a polymer material with strong histocompatibility, even with various properties of human cranial bone, and good postoperative recovery. Once a patient’s friend has a cranial defect, they must go to a regular hospital for cranial repair surgery as soon as possible, and they must choose a truly ideal cranial repair material to achieve better cranial repair results. peek material has very good physical properties, with toughness, strength, insulation, elasticity, stability, and other aspects almost similar to autologous cranial bone, and secondly, PEEK material does not interfere with ray Secondly, PEEK does not interfere with radiation transmission, does not affect the postoperative CT MRI results, and it is three-dimensionally shaped to achieve a very perfect structural repositioning.