In fact, in today’s developed medical environment, cranial repair is already a relatively routine surgery in neurosurgery, which is not complicated and not very difficult, so it is not a big surgery. Cranial repair is basically completed after the area of skull defect is fully exposed and the artificial or autologous bone repair material is installed and fixed. Therefore, the surgery is safe and the risk of surgery is not high, so it is recommended that patients with cranial defects have cranial repair surgery as soon as possible. The material used for skull repair is very important. Although the titanium mesh material, which is widely used in clinical practice, is much more advanced than other traditional materials, there are still many problems or complications, which affect the repair effect and restrict the patient’s quality of life in the future. Therefore, patients need to choose a more suitable material for skull repair is the most important issue to consider at present. Currently, the Department of Neurosurgery at Civil Aviation General Hospital is using a new polymer material, polyether ether ketone (PEEK), to repair the skull, achieving unprecedentedly good results. “The three-dimensional reconstruction technology of this PEEK material can perfectly restore the physiological structure of the skull according to the patient’s cranial CT data and precisely fit the defective bone window. In addition, the performance of this material is comparable to that of autologous skull in terms of elasticity, thermal insulation, hardness, and stability, which is a perfect cranial bone replacement material without foreign body reaction or interference with future radiological examinations .” Basically, it can be said that after the repair with peek is completed, it is not much different from the patient’s own cranial bone. In terms of surgical difficulty, cranial repair is not a big operation compared to other cranial operations that need to be performed inside the skull; it is not a big operation for neurosurgeons, but for the patient or the family, it involves a cranial operation after all, which may be psychologically stressful. Cranial repair surgery itself has a very low risk level, because cranial defects are unsafe in life, and they do affect the aesthetics.