Cranial repair is a very frightening thing for everyone, but it is a very routine procedure in neurosurgery. If the skull is missing for a long time, it will bring great harm to the patient, not only the physical symptoms such as headache, dizziness and weakness of limbs, but also the mental harm, many patients are not willing to face life after the skull is missing, moreover, they are not willing to face the crowd, which will form depression and low self-esteem over time. Therefore, it is important to repair the missing skull in time to overcome the fear psychology. What is the hardness of the skull repair material? The hardness of the repair material varies from one repair material to another. Cranial bone repair has gone through a long and tortuous development, during which the cranial bone repair materials have been constantly updated and progressed, and the performance of the repair materials has gradually approached perfection. At present, titanium mesh is widely used, but titanium mesh as a repair material will inevitably produce side effects and complications for some patients, while the hardness and even all aspects of the peek material is more excellent than titanium mesh basically will not have such a situation, it is not only good hardness, excellent resistance to impact, and peek material so that patients in the postoperative basically will not produce rejection, elasticity, good projection, insulation, and can achieve a high degree of heat insulation, Insulation, and can achieve the most ideal for each patient for the aesthetic appearance of the needs. At present, peek material has been widely used in patients with cranial defects, and the postoperative recovery is very good, and the public recognition further shows the excellence of peek material. Doctors who mainly use peek material for skull repair have said that it is the most ideal material for skull repair nowadays because its performance is comparable to the human skull itself.