The main purpose of cranial repair is to make the patient with a cranial defect look like a normal person after repair. This includes not only the aesthetic issue, but also the pressure of the skull after the repair, and the compatibility with the human body. In the past, when the medical level was not so developed, people used animal bones and allograft bones for repair, although they were bones, but the compatibility was still not good, so the later relied more on materials for repair, and titanium alloy material for skull repair came into being at that time. This material is superior to those early materials, so it became a popular skull repair material, but titanium mesh repair skull is not without drawbacks, it is hot and cold reaction, the patient’s reaction is especially obvious when the seasons change, and secondly, the titanium mesh is exposed to infection, once the infection occurs, it needs to be replaced, which is very dangerous and consumes time and financial resources. Because of the lack of new materials, titanium mesh repair has been used for many years. It is only in recent years that a new type of cranial repair material, polyether ether ketone material, also called peek, has begun to make a splash in cranial repair. peek, a material that avoids the limitations of titanium mesh, is an advanced polymer material with good thermal insulation, strength, elasticity and hardness comparable to autologous cranial bone, and is an excellent material for current cranial repair surgery. The big advantage of PEEK is that it mimics cranial bone. In fact, it is even more resistant than cranial bone in terms of mechanical properties alone, and because it is an embedded repair, the review film is beautiful and tight after it is done, and it is not affected by heat or cold. The PEEK material is permeable to rays and does not produce metallic artifacts, and another great advantage of PEEK is that it is highly inert and has very little scalp irritation. It is a very good material for skull repair.