Cranial defects are very common nowadays, due to various reasons. Nowadays, skull repair is a common brain surgery procedure to repair skull defects caused by traumatic brain injury and craniotomy. When it comes to this procedure, patients inevitably have to consider the cost, and some patients may ask how much the skull repair material costs. This is mainly based on the different repair materials. Like the traditional plexiglass, light apatite and calcium phosphate bone cement materials, the price is relatively cheap, but because of its more disadvantages, it is now basically less used; while the titanium mesh material is now widely used in clinical practice, the price is not high, but this material has progressed, but still has certain disadvantages and complications, and is still not the ideal material. Currently, a better material for cranial repair is polyether ether ketone, or PEEK. We have used this material for cranial repair surgery and have achieved excellent clinical results. This material can be customized in three dimensions and can restore the anatomical structure of the skull. In addition, this PEEK material is highly compatible with the autologous skull and is comparable to the autologous skull in terms of elasticity, heat transfer, hardness, stability, etc. Especially for pediatric patients, it can better adapt to the growth and development of the autologous skull.