The skull is a very hard piece of bone tissue in the human skeleton, which builds a defensive wall for the brain. However, the skull is not unbreakable, and a sudden impact can cause damage to the skull. Once the skull is damaged, there are a lot of problems to be faced, and in order to avoid more injuries, it is imperative to have skull repair surgery. Cranial repair surgery is one of the more routine procedures in neurosurgery. The entire procedure is relatively short and the post-operative recovery period is not long. From admission to diagnosis, to surgery, to discharge, the whole process takes about half a month or so. This recovery, of course, is also related to the materials used for skull repair. For example, the titanium mesh material, which is widely used in clinical practice, has some problems. Postoperative problems such as chronic pain, more subcutaneous fluid, sensitivity to hot and cold reactions, chronic cutting ulcers, etc. may occur, and they also affect postoperative medical examinations such as MRI and CT. Currently, we are using a new polymer PEEK material for skull repair, with excellent clinical results and skull perfection. This material can be reused after sterilization if craniotomy is needed later.