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 cranial defects, when the tissues inside the skull are unable to function properly in a safe environment, are enormous. Cranial defects are very harmful, timely repair to protect health Cranial defects patients will often have headaches and dizziness, the edge of the skull defect will have obvious pain, in addition, cranial defects will make some patients appear memory loss and concentration phenomenon, and in the long term, it will also lead to the 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. Cranial repair material is very important to do cranial repair surgery in addition to go to a regular hospital, the choice of material is also very important, the material chosen right choice, the effect of repair is better. Traditional materials include hydroxyapatite, calcium phosphate bone cement, plexiglass, etc., 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 promoted for use, it is peek material. New PEEK material repair skull performance peek material repair skull will be easily infected, postoperative discomfort? peek material is a very safe and advanced materials, its appearance, to make up for the various shortcomings of the previous materials, postoperative basically will not appear infection and rejection problems, patients rarely have discomfort symptoms. In comparison, the performance of peek material is relatively stable, comparable to autologous skull, elasticity, good thermal insulation, and three-dimensional reconstruction production function, the shaping effect is quite good, is the ideal cranial bone repair material.