The human skull is an important barrier to protect the brain, but in some cases, due to some irresistible factors, the skull may be damaged, such as some people may fight and injure the skull, some falling objects may also injure the skull, and some intracerebral lesions may require the removal of part of the skull bone flap during treatment, etc. These cranial defects require cranial bone repair surgery. When it comes to cranial repair surgery, patients are concerned about the full cost of cranial repair surgery. The cost varies depending on the material used for the repair. For example, the cost of titanium mesh, which is commonly used today, is slightly lower, while we use a more advanced repair material called polyetheretherketone, or PEEK, which may cost more. The PEEK material has the advantage that the general titanium mesh material does not have, this material is three-dimensional custom-made, can restore the anatomical structure of the skull, in addition, this PEEK material can be highly compatible with the autologous skull, and in terms of elasticity, heat transfer, hardness, stability and other aspects are comparable to the performance of the autologous skull, especially for pediatric patients, he can better adapt to the growth and development of the autologous skull.