In today’s state of society, cranial defects are relatively common, and after they occur, patients are generally advised to take cranial repair surgery at a regular hospital this morning. Cranial bone repair surgery is necessary? Cranial defects in fact, cranial defects are serious harm to the body, if you do not do cranial repair surgery as soon as possible, then there are not only aesthetic and safety issues, but also may affect the intracranial cerebrospinal fluid circulation, blood circulation, etc., affecting the normal operation of the brain and nerve function, resulting in a series of cranial defects syndrome, a serious threat to life and health. At the same time, it is also a kind of trauma to the patient’s psychology, and the patient often has some psychological disorders, low self-esteem, depression, sullenness, poor spirit and so on. So timely cranial bone repair is necessary. At the same time, the choice of materials for cranial bone repair is very important, the current medical application of new polyether ether ketone PEEK material. First, the main components of PEEK are hyaluronic acid and Ebève, high biocompatibility, postoperative complications and the phenomenon of foreign body reaction, there is basically no clinical. Second, PEEK has a better modulus of elasticity, and the bone plate made by 3D technology printing can be perfectly three-dimensionally shaped according to the patient’s monitoring data before the operation, perfectly restoring the original structure of the head. Third, the strength, insulation and stability of PEEK are similar to that of the autologous skull, and it will not affect the medical examination such as CT MRI in the future, and even if craniotomy is needed in the future, this material can be reused after sterilization. We use an advanced polyether ether ketone PEEK material, which can rebuild a complete closed cranial cavity environment for the patient, which can help the recovery of the corresponding neural function, and achieve the good effect of structural integrity, perfect function, and beautiful appearance.