Cranial defect is a common sequelae after craniotomy due to cranial injury, cranial osteoma, etc. When the defect area exceeds 3 cm, it not only seriously affects the patient’s aesthetics, but also presents a variety of clinical manifestations such as headache, dizziness, mood changes, pulsation in the defect area, etc. It can even induce epilepsy, which seriously affects the patient’s normal work and life. Therefore, skull repair should be done as soon as possible to protect brain tissue, relieve clinical symptoms and restore patient’s aesthetics. PEEK is a very mature material that has been widely used as a cranial repair material in many countries, but not many domestic do, the reason PEEK material is a new repair material, because patients do not know much about PEEK material for cranial repair, which restricts the widespread use of PEEK material. Not only is heat resistance better than other high temperature resistant plastics, and has high strength, high fracture toughness and good size invariance, is currently a good material for cranial repair. PEEK is the best material for skull repair. The cost of skull repair surgery is not a concern for the patient, the cost of surgery is related to the size of the repair material used at the patient’s site of illness, the greater the damage to the repair site the higher the cost will be, and this is not a concern for you. Of course, if you have medical insurance, you can enjoy the medical insurance policy.