It is often said that the skull is the defense wall of life safety, because it protects our brain all the time. However, accidents can happen at any time in life, and it is very dangerous when the skull is damaged after an impact. Skull repair surgery is necessary to prevent further damage to the skull. However, the skull repair surgery must pay attention to the choice of materials. The titanium mesh material is widely used in the clinic, and it is obviously a great improvement compared with the previous materials. However, after a lot of clinical verification, there are some unavoidable problems in choosing titanium mesh material for skull repair surgery, among which the more serious is the situation of exposed titanium mesh material. The rate of exposed titanium mesh cranial repair and the reasons are what many people have doubts, why is it so? According to the survey, titanium mesh material repair cranial exposure rate should be considered quite high compared to the new PEEK material, the reason for the exposure is due to these points: first, the poor histocompatibility of titanium mesh material; second, the surgical incision is infected, and patients have allergic reactions that lead to material exposure; third, because the titanium mesh material is large and easily loosens when fixed, and then the exposure occurs. And so on for various reasons. Once the titanium mesh material is exposed, it is really troublesome to repair the surgery and remove the material in time, so that the previous surgery will be done in vain. I believe that no patient is willing to take such a risk, so it is important to choose carefully when doing skull repair surgery. The use of PEEK, a new type of material that is gradually becoming known, is the ideal choice for cranial repair surgery because it avoids the defects and deficiencies of titanium mesh, which is a very advanced polymer material with properties comparable to autologous cranial bone. At present, the use of polyether ether ketone PEEK material as a cranial repair material, not modest to say that we are still very professional in this area, we introduced the new material PEEK early, but also continue to improve the technology upgrade and material optimization design, and the successful introduction of the concept of cosmetic surgery, so that the surgical results are more natural and beautiful, highly praised by patients.