There are always some unforeseen events in life, such as car accidents, collisions, intracranial diseases, and other surgeries that may cause skull defects and cranial collapse or bulging. Patients with cranial defects need to undergo cranial repair surgery as soon as they have recovered from surgery. Peek material, also called polyether ether ketone material, has great advantages in repairing the skull. peek material is a light weight and high strength material, its elastic modulus is very close to the autologous bone, patients will not produce any foreign body feeling after using it, the high hardness makes patients will not have the concern of collapse after being subjected to external force; peek material is permeable to radiation and will not affect the postoperative examination The most noteworthy is its cosmetic effect, using advanced 3D printing technology to replicate the patient’s defective skull, which can be closely articulated with the surrounding bone window, and the head is more smooth and flat. Warm tip: the material is now in widespread use, there have been many patients through the peek material to repair the skull, restore the original skull original appearance, peek material has become the latest trend in repairing the skull.