The skull is a very, very important part of the human skeleton and plays an important role in protecting brain tissue, maintaining intracranial pressure and a stable intracranial environment. However, as things are unpredictable, people sometimes encounter danger and sometimes the skull can be damaged. For example, accidents such as traffic accidents and falling objects may lead to cranial defects. After a skull defect, a skull repair is needed in time. Generally, if it is an open cranial defect with clean wound, repair surgery can be performed in one stage, while if it is a closed craniocerebral trauma with large bone flap cranial defect caused by intracranial hypertension and debridement decompression, it needs to be repaired after 2-3 months. It can be seen that the timing of cranial repair is important. In addition, the choice of materials for cranial repair is also very important. There are many cases of postoperative problems due to improper choice of materials. For example, most of the titanium mesh materials used in clinical practice have various problems, such as postoperative infection and postoperative rejection, and some even cause the scalp tissue to be broken and the titanium mesh to be exposed, which looks particularly scary. In fact, there is already a very ideal skull repair material, which is polyether ether ketone PEEK material. This polyether ether ketone material is a very advanced special polymer material, its various properties are comparable to the human autologous cranial bone, non-rejection, non-infection, three-dimensional shaping, perfect recovery of the cranial physiological structure, can completely avoid the above-mentioned problems, to avoid the post-operative material exposed situation. Polyetheretherketone PEEK material is gradually becoming the latest trend in cranial repair materials because of its good biocompatibility, ability to complex shaping, excellent mechanical properties, good protective properties, and high postoperative comfort.