I believe we are all familiar with cranial repair surgery, cranial repair surgery is a relatively routine operation in neurosurgery, for traumatic brain injury and craniotomy surgery, resulting in cranial defects and a kind of surgery for its repair. After a long period of development and progress, cranial bone repair technology has been very mature, the specific operation is not difficult, mainly in the choice of repair materials. Generally, it takes about 3 months for the skull to recover from the defect and then it is repaired. During the surgery, the scalp is cut open, the periosteum is bluntly separated, the bone window is completely exposed, the prosthesis is placed in the bone window and adjusted to achieve physiological and anatomical repositioning, and the skin is sutured layer by layer. Surgery is not difficult to perform, mainly because of the application of good repair materials. At present, there are some problems with the widely used titanium mesh material, such as the possibility of rejection, discomfort, chronic postoperative cutting pain, sensitivity to heat and cold, etc., and will affect the future CT, MRI and other medical examinations. PEEK material has excellent biocompatibility, can be three-dimensionally shaped to accurately fit the defective area, and its elasticity, heat insulation, stability, strength and other properties are very excellent, which makes it an ideal material for cranial bone repair.