The skull is a piece of human bone that can not be missing, it plays a supporting and even protecting role for the brain, it can effectively prevent the outside world from attacking our brain. But things are unpredictable, in the case that we have not reacted to the situation, some accidents happened, hit the skull, resulting in skull defects. The effects of a skull defect, when the tissues within the skull are unable to function properly in a safe environment, are extreme. After the skull defect, patients will often have headache and dizziness, the edge of the skull defect will have obvious pain, in addition, the skull defect will make some patients have memory loss and inattention and other phenomena, and in the long run, it will also lead to atrophy of the brain tissue and so on. Therefore, the problem of cranial defects should be taken seriously enough, and timely repair in order to return to their own health. Do skull repair surgery in addition to go to a regular hospital, the choice of materials is also very important, the material chosen right choice, the effect of repair is better. Traditional materials include hydroxyapatite, calcium phosphate bone cement, plexiglass and so on, but these materials have their own shortcomings and are no longer used in clinical practice. Even the titanium mesh material commonly used nowadays still has many disadvantages. At present, a new type of polymer material is being promoted for use, which is peek material. Will the peek material be easy to be infected when repairing the skull? The peek material is a very safe and advanced material, its appearance, to make up for the various shortcomings of the previous materials, after the operation basically does not appear infection and rejection problems, patients rarely have discomfort symptoms. In contrast, the performance of peek material is relatively stable, comparable to the autologous skull, elastic, good thermal insulation, and three-dimensional reconstruction production function, shaping effect is quite good, is the ideal cranial bone repair material.