The skull is one of the hardest bones in the human body, and it is because of this protective barrier that our brain tissue is able to work and function properly. However, accidents are unavoidable and many people suffer from cranial defects due to accidents, which can be very harmful to their health. The only way to avoid further damage is to undergo cranial repair surgery. The first thing to consider about cranial repair surgery is the material used for the repair. From the past to the present, the use of cranial repair materials has been constantly revolutionized. In the beginning, bone cement and plexiglass were used, but after many surgeries, these materials have been proven to have some problems and have been slowly eliminated. Later on, titanium mesh materials were used, but although they have their progress, they still have defects and shortcomings. In order to achieve a better effect of skull repair, there is now a more advanced material, that is, peek material. peek material is a polymer material, all aspects of the performance of the human skull is comparable to the human skull, and according to the patient’s head shape for three-dimensional molding design, highly restore the skull structure, the patient will not appear after the operation of the phenomenon of xenophobia, do not have to worry about the infection problem, it is the current very ideal material to do cranial bone repair surgery. It is the ideal material for cranial repair surgery.