Cranial repair surgery is now a relatively routine procedure in neurosurgery, with well-established techniques and a wide range of applications. In fact, it is also a procedure with a relatively long history, as our forefathers were practicing such surgical medicine thousands of years ago. After thousands of years of development, cranial repair is now very sophisticated. During thousands of years of development, not only has the repair technique been improved, but the materials used for cranial repair have also undergone many updates and upgrades, and highly desirable materials have now emerged. In the beginning, ancient doctors might only use a piece of flannel to cover the bone window for repair, or in some cases, a piece of metal, but in general the surgical materials were rather crude at that time. Later, hydroxyapatite, calcium phosphate bone cement, plexiglass and other materials, as well as a variety of metal materials, but they are not widely recognized because of one problem or another. In recent years, titanium alloy materials have been commonly used clinically for cranial bone repair, and although there have been advances, there are still more problems. Some patients ask how long the titanium alloy skull will last. In fact, the problem of titanium alloy does not lie in how long it can be used, its durability is possible. However, the biocompatibility of titanium alloy is not very good, sometimes there are rejections and infections, and this metal material is not insulated, which will lead to postoperative patients’ sensitivity to hot and cold reactions, and will also affect the acceptance of postoperative CT MRI and other medical examinations and other problems. If you use the most advanced polyether ether ketone PEEK material, can be a good solution to the above problems. PEEK material biocompatibility is particularly good, will not occur in the rejection of infection, heat insulation is also very good, does not affect the radiation projection, will not interfere with a variety of postoperative medical examination. Moreover, PEEK materials are very stable and can be used for a lifetime.