Nowadays, cranial repair is a common operation in neurosurgery to repair the defects caused by various reasons, with the aim of restoring the complete closed cranial environment, providing proper support and guarantee for the normal performance and operation of cerebrospinal fluid circulation, blood circulation and neurological function in the cranium, which has important positive significance for the life operation of the body. In recent years, due to various accidents, such as traffic accidents, production safety accidents, falling objects, and craniotomy due to cranial diseases, the incidence of cranial defects is very high, and cranial defects have become a common clinical disorder in neurosurgery. Then skull repair for cranial defects has been carried out more widely in clinical practice. There are many patients with cranial defects due to various reasons all over the country who need timely cranial repair surgery. As a routine procedure in neurosurgery, cranial repair is generally available in the neurosurgery departments of many large hospitals. However, although cranial repair is routine, it is not easy to do it well. Many local hospitals use the more traditional cranial repair material – titanium mesh material to repair, this metal material is actually not very ideal, in clinical use may also have various problems and shortcomings, such as postoperative infection rejection, wear scalp, resulting in material exposure, and also affect the CT nuclear magnetic examination, postoperative Because of non-insulation and sensitive to the external hot and cold environment, and because the material is not hard enough, and easy to be deformed by external forces, resulting in the collapse of the scalp, and other problems. At present, we use a very advanced polyetheretherketone pek material to perform skull repair surgery. Polyetheretherketone peek material is a new type of special polymer material, and its properties are very close to human autologous skull, which can overcome the above-mentioned problems that may arise from titanium mesh material, and achieve excellent results in the clinic. It can achieve the overall unity of anatomical integrity, perfect function and beautiful appearance, and is widely praised.