The skull is an important barrier to maintain the integrity of the head and facial shape and protect the skull from the outside world, but cranial defects can also occur. Cranial defects are mainly common after various traumatic injuries and debridement decompression, such as accidents, falling objects, craniofacial surgery, etc. If the skull defect area reaches 3*3cm or more, it is indisputable to do skull repair surgery only so that more injuries and complications can be avoided in time. However, many patients do not know much about cranial repair surgery, such as the materials for repair, the full cost of cranial repair surgery and other issues. Cranial repair surgery is a common surgical procedure and the cost of repair surgery is related to the cost of examination, hospitalization, materials and surgery. The purpose of the surgery is to take repair materials to make a good repair to the defective area. Titanium mesh is currently used as the most common cranial repair material, its price is not high, but there are great defects and poor postoperative results, so cranial repair also needs to choose more advanced repair materials. With the progress of modern technology, polyether ether ketone peek material has become the ideal choice for skull repair surgery, although the price of this material is a little more expensive, but the effect is very superior. The peek material has a very close to the human bone because of its properties, the repair of the cranial bone stress integrity. Low rejection and high stability. Simply put, this material is more “compatible” with body tissues, no metal heat and cold conduction reaction, effectively prevent intracranial temperature imbalance, and does not affect future medical imaging, such as CT or MRI.