Craniocerebral injury and cerebral hemorrhage often require decompression surgery by debridement to control intracranial pressure. After the surgery, the brain tissue at the debridement site is placed under the direct action of atmospheric pressure, which directly affects the brain tissue due to the lack of the protective effect of the skull, and the atmospheric pressure outside the skull directly damages the brain function. In addition, the temperature outside the skull also directly affects the brain tissue, and too much cold and too much heat is not conducive to the recovery of neurological function. Some studies have shown that there is a significant change in neurological function after cranial defect repair, and the earlier the cranial repair, the better. Patients with open skull comminuted fractures with better wound cleaning and no cranial hypertension are generally recommended to undergo cranial repair surgery at the first stage, while those patients with severe closed cranial trauma and cranial defects that occur during cranial hypertension decompression with large bone flaps need to undergo cranial repair surgery at about 2-3 months. When performing cranial repair, the choice of material is also very important, first of all, it needs to have good biocompatibility to reduce postoperative complications; it also needs to have light weight and high strength to eliminate the patient’s concern of force-free collapse after surgery; of course, aesthetic effect is also an aspect that patients are extremely concerned about when choosing materials to restore the original appearance of the cranial and maxillofacial surfaces while also satisfying the patient’s wish of shaping beauty. Fortunately, there is a kind of polyetheretherketone material with excellent performance, which can be used for cranial bone repair to achieve very good and ideal results. This polyether ether ketone material, also called PEEK, is a special polymer material with very high biocompatibility, three-dimensional shaping, precise anastomosis of the defective bone window, and in terms of elasticity, hardness, insulation, stability and other properties are comparable to the autologous cranial bone, is a very good cranial repair material.