Cranial repair is a routine surgery for cranial defects caused by trauma and craniotomy, and the main purpose of the surgery is to protect the soft tissues of the brain. The choice of repair material for cranial repair surgery is also very critical. The choice of cranial repair material must first be highly biocompatible, and the repair material must be sufficiently resistant to blows, as well as perfectly shaped. PEEK is the perfect combination of toughness and rigidity among all resins, and its strength and fatigue resistance are even better than some metals and alloys. Because PEEK is a resin that is not toxic, its molecular structure is very stable and histocompatible, and PEEK materials do not react to heat or cold, and will not burn or frostbite the soft tissues of the brain at high or low temperatures. The PEEK material has excellent self-lubrication and wear resistance and will not abrade the skin of the head after surgery, nor will the repair material leak, making it the ideal material for skull repair. Reimbursement for skull repair surgery is a concern for patients. The cost of cranial repair surgery can be reimbursed by medical insurance or New Agricultural Cooperative, which patients do not need to worry about. Patients with cranial defects are advised to repair their skull as soon as possible to regain their health.