Some people in life have skull defects for one reason or another, which not only damage their image, but also seriously threaten their health and safety. Cranial defects have to be repaired with cranial bone repair surgery to help mitigate the damage. With a skull defect, the brain tissue is not protected by the skull, which causes the atmospheric pressure outside the skull to act directly on the brain tissue, severely damaging the brain function of the patient. The temperature outside the skull also affects the brain tissue, and uneven heat and cold are not conducive to the recovery of brain nerve function. Patients are worried, but in order to get a better recovery, patients should not have too much psychological burden, cranial defects are indeed very harmful, but as long as they receive an effective cranial repair surgery at the right time, the brain nerve function will be significantly improved after the repair. The current material for repairing the skull is polyether ether ketone, or PEEK, which is a very ideal material for cranial repair. This polymer material is biocompatible due to the material, and PEEK can be customized in three dimensions to completely restore the anatomical structure of the skull, In addition, this PEEK material is a bionic bone that is highly compatible with the autologous cranial bone and is comparable to the autologous cranial bone in terms of elasticity, heat transfer, stiffness, and stability. Of course, the postoperative care should be done well, as the saying goes, medicine is better than food. As the saying goes, medicine is better than food. For cranial bone repair patients, the diet should be light, especially avoiding coffee, strong tea, chocolate and other refreshing foods. More fruits and vegetables in season can promote the growth and healing of the wound. It is recommended that patients should have skull repair in time after skull defect, and it is very important to choose the appropriate repair material. After the operation, we should pay attention to the above precautions and develop good living habits to help our health.