In reality, however, there are various dangerous factors that may cause damage to the skull, such as car accidents, such as traffic accidents, such as brain surgery that has to be performed due to craniosynostosis, etc., which may cause cranial defects. This will expose the brain to external danger, destroy the stable intracranial environment, cause blood circulation and cerebrospinal fluid circulation disorders, and affect the operation of various neurological functions, which is very harmful to the organism, sometimes even fatal. Therefore, once a cranial defect occurs, cranial repair surgery is needed in a timely manner. In most hospitals, titanium mesh is generally used for skull repair surgery. Compared with animal bone, light apatite and calcium phosphate bone cement used in the past, titanium mesh is more advanced. However, there are still some problems with titanium mesh material, and there are more disadvantages and complications, such as the patient’s sensitivity to heat and cold after surgery, chronic local pain and more subcutaneous fluid; after repair, it affects the patient to receive CT, MRI and other medical examinations; chronic cutting ulcer and stress perforation cause cranial repair failure; irregular facial and cranial parts such as temporal fossa, zygomatic arch and eyebrow frame are repaired with poor cosmetic appearance, etc. Currently, the clinical use of the latest polyetheretherketone material, also called PEEK material, can better solve these problems. This PEEK material can be shaped in three dimensions and fit precisely. In addition, it is a bionic material that can be highly compatible with autologous cranial bone and has comparable performance with autologous cranial bone in terms of elasticity, heat transfer, hardness, and stability, especially for pediatric patients, which can better adapt to the growth and development of autologous cranial bone.