Cranial repair is a relatively routine procedure in neurosurgery and is widely used. Because it is true that in recent years the incidence of skull defects is relatively high, one is a variety of traffic accidents more and more, production safety accidents occur frequently, which may cause damage to the skull, skull, and another is a variety of craniocerebral disorders in the craniotomy may be some cases need to remove part of the bone flap, which results in the defect of the skull. After the occurrence of cranial defects not only affects the external aesthetics, some collapsed, some bulging, looks more scary; in addition, cranial defects will also have a lot of adverse effects on the body, resulting in intracranial blood circulation, cerebrospinal fluid circulation obstacles, affecting the normal operation of the cerebral nervous function. Therefore, once a skull defect occurs, it is necessary to carry out cranial bone repair in a timely manner. Currently, one of the more important influencing factors in cranial bone repair surgery is the choice of repair material. For example, there is a titanium mesh material that is widely used, but there are still many problems. So what are the cases of titanium mesh skull repair failure? Clinical often appear titanium mesh skull repair after the phenomenon of rejection, or postoperative infection, and will lead to poor healing of the scalp, resulting in the exposure of the material, etc., and titanium mesh material insulation is poor, resulting in postoperative heat and cold environment intolerance of the patient and discomfort and so on. Now there is a more ideal cranial bone repair material, polyether ether ketone PEEK material, PEEK material is a special polymer material, its properties are basically comparable to the autologous cranial bone, can be very good to avoid the above problems, and clinical practice has proved that the effect is very ideal.