In life, some children may suffer from cranial defects after craniotomy due to car accidents, impacts, intracranial diseases, etc. This is a very scary thing in the eyes of children. This is a very scary thing in the eyes of the child, the skull defect will have a great impact on his psychology, so that he can’t play with children confidently, resulting in a serious inferiority complex, which is not conducive to the healthy physical and mental development of children, in addition, a long period of time of defective skull will also cause an imbalance in the intracranial pressure, which will lead to dizziness, epilepsy and other symptoms. Therefore, the repair of the skull is necessary and important. However, most hospitals use titanium mesh as the repair material, and the choice of repair material is also an important indicator when choosing a hospital. The most ideal repair material should be comfortable to use without any foreign body sensation and without any rejection reaction after use. However, the current titanium mesh has been shown to cause different degrees of rejection in some patients, and some patients have even experienced pain at the edges and exposure of the material. Is there not a more perfect material? In fact, some hospitals use polyether ether ketone material is a quite ideal repair material. The current new polyether ether ketone PEEK material performance is more excellent, more compatible with the human environment, higher strength, better protection, better molding effect, so whether for adult skull defect patients or for children skull defect patients, the use of polyether ether ketone PEEK material for skull repair is a more sensible, more ideal choice.