Cranial bone repair surgery, in neurosurgery is a very routine, very common, but also very classic a surgery, many patients because of trauma or because of cerebral hemorrhage or because of some intracranial disease and craniotomy, after the bone flap decompression, will be left behind the skull defect, which needs to be timely cranial bone repair surgery. The more widely used material in hospitals around the world for skull repair surgery is titanium mesh. Many patients may be aware of some of the defects or deficiencies of titanium mesh, for example, titanium mesh histocompatibility is not too good, postoperative infection, rejection of this present; for example, titanium mesh insulation is not very good, postoperative may be more sensitive to the external hot and cold environments, resulting in a lot of discomfort; for example, titanium mesh as a kind of metal will affect the radiation projection, which affects the operation to accept the ct, MRI, and other medical examinations; and also for example, titanium mesh hardness, the hardness of titanium mesh is very good. For example, titanium mesh as a metal will affect the projection of radiation, which will affect the postoperative medical examination such as CT, MRI and so on. Titanium mesh skull repair surgery, if no special circumstances occur after surgery, pay attention to the protection of the general will not be still dangerous, but if the impact of a relatively strong external forces, hardness is not too high, the force deformation of the chances of depression is still very large, clinically we have seen a lot of such examples. For example, there is a patient in jiangxi, he also used too late for road repair after 6 years, no problem. But recently after another impact just hit the area covered by his titanium mesh, the deformation of the depression occurred, the scalp obviously sunken down a small piece, causing him a lot of discomfort, frequent headaches, dizziness. Later, he came to our hospital for a PEEK cranial repair surgery in which the titanium mesh was removed and PEEK was inserted, and he achieved very good results after the surgery. Therefore, titanium mesh cranial bone repair surgery, easy to be deformed by the external forces of depression, this is a major defect, not very recommended to use titanium mesh for cranial bone repair surgery. At present, the more ideal cranial bone repair material, counting polyether ether ketone PEEK material, which is a new type of special polymer materials, hardness is very high, basically will not be deformed. In addition, the other properties of polyether ether ketone PEEK material are very excellent, very ideal, and human autologous cranium basically equivalent to the performance of the titanium mesh material is very good to overcome the above problems that may occur in the clinic has achieved very good results.