Cranial defects are a relatively common disorder in neurosurgery, and the incidence is relatively high. People of all ages can end up with cranial defects due to various hazards, such as traffic accidents, production safety accidents, falling objects, children playing games, and craniotomy due to craniosynostosis, etc. All of these can end up with cranial defects. Therefore, children are not an exception and are also a potential group of people to suffer from cranial defects. How to protect children with cranial defects? When cranial defects occur in children, it is actually more important to deal with them and protect them in time. If cranial defect occurs in children, the intracranial environment will change drastically, the intracranial pressure will be unstable, the cerebrospinal fluid circulation, blood circulation, and the normal function of nerves may be affected, and the development of the brain may be damaged. In addition, children are in the active age, the awareness of self-protection is not strong, if the bump or external sharp object attack, then it is likely to directly injure the brain tissue, serious or even life-threatening, very dangerous. Therefore, the best protection for children with skull defects should be timely skull repair. Our team uses the new polyetheretherketone peek material which is very advanced at present and carries out peek cranial repair and plastic surgery extensively, constantly carries out technical improvement and innovation and material optimization design, also introduces the concept of cosmetic plastic surgery, not only can repair the skull for the patient, but also carry out personalized cosmetic disposal of factors affecting the aesthetic appearance, which can finally achieve the organic unity of anatomical integrity, functional perfection and aesthetic appearance. It is the first choice of repair material for patients.