In normal life, there are many people who suffer from cranial defects due to various reasons, such as traffic accidents, production safety accidents, falling objects, and the need for craniotomy due to certain cranial diseases that we may suffer from, etc. All these risk factors may cause cranial defects. What is the protection for skull loss? After cranial defects, it is necessary to perform cranial bone repair surgery in a timely manner, i.e., to use certain artificial materials to repair the cranial defective area and to protect the brain tissue and the organs of the head and face again, which is important for human health and the life operation of the whole organism. Cranial repair surgery is a routine procedure in neurosurgery and the technology is very mature. It is also a procedure that has a long history if repair. It has been developed for thousands of years. According to archaeological research, our human ancestors were practicing such surgical practice of cranial repair as early as 7000 years ago. After a long period of development and improvement, the technology of cranial bone repair surgery has become very mature, and the material of cranial bone repair has also undergone continuous evolution and innovation, so there are very good materials to re-protect the skull after it is missing. At present, polyetheretherketone peek material is a very ideal material for cranial repair, which is favored by neurosurgeons because of its excellent performance, and gradually becomes a new trend of cranial repair material. Polyetheretherketone peek material is a new type of special polymer material, its various properties are very close to human autologous cranial bone, used for cranial bone repair, the effect is very ideal, strong protection performance after implantation into the human body, high comfort. peek material is very strong hardness, can play a good protective role; peek material heat insulation is good, will not be sensitive to discomfort due to the external hot and cold; peek material will not interfere with all kinds of radiation and magnetic field, does not affect the patient to receive post-operative ct nuclear magnetic examination; peek material tissue compatibility is very good, basically will not occur post-operative infection rejection and other situations; peek material can be personalized three-dimensional plastic design according to the patient’s bone window shape, highly restore the skull structure; peek material is embedded repair, repair the bone window edge is smooth articulation, will not The peek material is embedded and the edges of the bone window are smoothly articulated after the repair, so that it will not cause abrasion to the scalp and the appearance is more beautiful.