I had an accidental head injury six months ago, and now I have occasional dizziness, etc. I need to have skull defect repair surgery. The choice of repair material is crucial for skull repair, because good repair material can not only ensure the effectiveness of the repair after skull repair, but also reduce the emergence of complications for patients. Titanium alloy titanium mesh cranial material has poor histocompatibility, and it is easy to have rejection reaction. After doing titanium mesh cranial repair, some patients have to remove the titanium mesh due to rejection, such as titanium mesh leakage and skin infection, resulting in cranial repair surgery failure. The patients have to receive a second operation. In order to reduce the appearance of cranial repair complications, new PEEK materials can be used to do cranial repair, PEEK materials are semi-crystalline thermoplastic materials, it has high temperature resistance, chemical resistance, fatigue resistance, has excellent strength hardness and toughness. PEEK is a semi-crystalline thermoplastic material that is resistant to high temperatures, chemicals, fatigue, and has excellent strength, stiffness, and toughness. It is the perfect shape. It also reduces surgical time and risk to a large extent.