If the patient has brain hemorrhage or traumatic brain injury after surgery, is in a long-term coma, or is only bedridden with severe disability, cranial repair should not be considered for the time being, because cranial repair is to improve the patient’s quality of survival and strengthen the patient’s defense against potential dangers. If the patient is still not awake, or is bedridden with severe disability for a long time, cranial repair is not necessary, and if the patient is partially disabled, partially sided and conscious, it is more important to actively Cranial repair should be carried out, which can improve the patient’s self-confidence and self-esteem and facilitate further rehabilitation and improve the patient’s survival quality. Currently, it is considered that 3-6 months after trauma is a good time for cranial repair because the pseudomembrane between the scalp and brain tissue is formed during this period, which makes the repair easy to separate and the surgery less traumatic, but it is not necessary to perform the repair during this period. 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. At present, the repair materials are plastic titanium mesh, which fits tightly and has a beautiful appearance. The domestic materials are cheaper, but the workmanship is a little worse than the imported materials, but they can also meet the needs of the surgery, so the family can decide the surgical materials according to their own economic situation, without too much entanglement. Cranial repair titanium mesh is already a more mature cranial repair material, but there are still more disadvantages, such as postoperative sensitivity to hot and cold reactions, chronic local pain, more subcutaneous fluid; after repair surgery, affect the patient to receive CT, MRI and other medical examinations; chronic cutting ulcers, stress perforation to cranial repair failure; temporal fossa, zygomatic arch, eyebrow frame and other irregular facial cranial parts repair appearance cosmetic effect is poor, etc. Therefore, the patients with cranial defects should be treated with the same care and attention. Therefore, patients with cranial defects should choose the new polyetheretherketone PEEK material for cranial bone repair. This material is a polymeric biomaterial with a high degree of compatibility with autologous cranial bone. With the support of three-dimensional reconstruction technology, the PEEK bone plate can be seamlessly embedded in the defective bone window, blending with the autologous cranial bone. The advantages are obvious in terms of aesthetics, stiffness, and stability.