Cranial repair surgery is one of the more routine procedures in neurosurgery in current life. Patients with cranial defects go for cranial repair surgery, which is a short procedure with a short recovery period. From the time of diagnosis, to the surgery, to the time of discharge from the hospital, the whole process takes about half a month or so. This recovery, of course, has to do with the materials used for cranial repair. Cranial repair surgery is frequently required in neurosurgery. This surgery is also very old and classic. Thousands of years ago, our human ancestors were experimenting with cranial repair. Through continuous development and evolution, cranial bone repair surgery technology is becoming more and more mature, repair materials also follow the update and progress, from the beginning of the velvet sheet, metal sheet, to the later plexiglass, bone cement, silicone, etc., and then developed to the current commonly used titanium mesh, polyether ether ketone PEEK materials, along the way, the material performance is getting better and better, the effect of repair is more and more ideal. At present, polyether ether ketone PEEK material is a cranial bone repair material with very excellent performance and relatively better effect. PEEK has a better modulus of elasticity, and the bone plate printed and made by 3D technology can be perfectly three-dimensionally shaped according to the patient’s monitoring data before the operation, which perfectly restores the original structure of the skull. Recognized by neurosurgeons and patients with cranial defects.