The skull plays a very important role in the human body, protecting our brain from external damage and maintaining the stability of intracranial pressure. Many people think that cranial repair is a major surgery with risks, but in fact, in neurosurgery, cranial repair is only a routine surgery with high safety, and basically there are no accidents. Infection, rejection, exposure, and secondary repair are compelling The most used material for cranial repair is titanium mesh, but the disadvantages of titanium mesh are becoming increasingly apparent. Many patients have to undergo secondary repair due to post-operative infection, rejection, and even exposure of the titanium mesh. After removal of the titanium skull, the patient will revert to a collapsed or bulging skull, which may cause the patient to develop some cranial defect syndrome at this time. Such as headache, dizziness, fear of vibration and other manifestations or psychological disorders filled with low self-esteem and insecurity inside. Therefore, it is the best way to restore the skull to its original appearance by replacing the titanium skull with new material within the shortest time after removal. Take out the old and replace the new, one surgery to kill two birds with one stone At present, most hospitals in China, in the face of having to take out the titanium mesh, generally perform two surgeries, take out the titanium mesh, wait for the new material to be processed, and wait for the surgical wound to heal before the new material is replaced. This will not only take longer, but will also cause pain and psychological stress to the patient twice. If the new material can be replaced at the same time as the old one is removed, it will minimize the damage to the patient and relieve the patient’s pain, and there are hospitals in China that are capable of doing so. In the second skull repair material selection, the use of the performance is very good, and the closest to the autologous bone polyether ether ketone (peek) material can be better recovery, after the use of peek material, the basic postoperative infection, rejection and other situations, the patient in the use of comfortable, safe.