The skull is a very important bone tissue in the human body, which plays an important role in protecting and supporting the brain and head and facial organs, and is of great importance to the health of the whole person and the life of the body. However, there are many reasons for cranial defects, which often put the body in various dangers. It is necessary to perform cranial repair in time. Cranial repair is a routine surgery in neurosurgery and the technology is very mature. The choice of cranial repair materials has a great influence on the postoperative repair effect. Nowadays, titanium mesh is the most widely used cranial repair material in clinical practice, however, there are still some defects and shortcomings in this material. For example, it may cause infection and rejection after the operation, wear the scalp after the operation, causing the scalp to break down and material to be exposed; after the operation, it will affect the CT nuclear magnetic examination, sensitive to the external hot and cold environment, easy to be deformed and collapsed by external force and so on. For example, there is a middle-aged male patient from Henan province, Mr. Zhang, who was left with a femoral defect after a car accident in a local hospital and had a titanium mesh cranial repair, but several years later, the exposure of the titanium mesh occurred and the mesh needed to be removed and then repaired. This patient asked how much it would cost to replace the titanium mesh for skull repair. In fact, in his case, the titanium mesh cranial repair had already been a problem, and the titanium mesh material needed to be removed and repaired, so it is recommended that the titanium mesh should not be replaced, but a better material with better performance should be used. Currently there is a new type of special polymer material, polyether ether ketone peek material. This new peek material, the performance is very close to the human autologous skull, well overcome the titanium mesh may produce the above-mentioned various problems: good tissue compatibility, generally will not occur after surgery infection rejection; through three-dimensional reconstruction design three d printing production highly restore the skull structure, head shape beautiful symmetry; embedded repair, material and ancient smooth articulation will not cause wear and tear on the scalp; material Does not affect ct nuclear magnetic examination, and the material insulation is very good, there will be no sensitive reaction to the external cold and hot environment; this material is very high hardness, will not be deformed by external forces, very good protection and high comfort. Polyetheretherketone peek has become a new trend in cranial repair materials. At present, our team is using this new polyetheretherketone peek material extensively, and the team keeps upgrading the technology innovation and material optimization design, and also introduces the concept of cosmetic plastic surgery, so as to carry out peek cranial repair, which not only can repair the skull completely again, but also carry out cosmetic plastic treatment on the factors affecting the appearance, so as to achieve the organic unity of anatomical integrity, functional perfection and beautiful appearance. The organic unity of anatomical integrity, functional perfection and aesthetic appearance is achieved, and the results are excellent and widely praised.