There is no denying that in recent years there have been more and more patients with cranial injuries caused by various accidents, but no matter what kind of cranial injuries should be repaired in time in order not to affect their physical and mental health. When is the best time for cranial repair? At present, it is believed that 3-6 months after trauma is the best time to repair the skull, in this time period between the scalp and brain tissue pseudomembrane formation, easy to separate the repair, surgical trauma is minimized, but does not have to be repaired in this time period, in any period of time thereafter can be cranial bone repair. If the patient is not awake at this time or for other reasons the repair is not performed, the repair can be performed at any time thereafter. The most important thing in the process of skull repair is to choose the right material, if the material is not chosen well, it will cause a lot of sequelae, such as scalp ulceration, deep visible bone and a series of other problems. At present, the better materials are PEEK, PEEK not only heat resistance than other high temperature materials, and has high strength, high modulus, high fracture toughness and good thermal insulation. At the same time, PEEK material will not affect the late patient’s medical examination, such as CT, B ultrasound, magnetic resonance, etc.; At the same time, it will not bring trouble to the patient after the healing of the airplane over the security check, etc.; Moreover, PEEK bionic artificial bone material is very good in terms of weight, flexibility, and reasonable strength.