Cranium is a hard and indispensable bone in human body, which plays a pivotal role in the normal operation and health of human life activities. When external factors or cranial lesions occur in the cranium itself, it will cause cranial defects, break the normal life trajectory and reduce the quality of life. When cranial defects occur, it is obvious that the patient’s appearance will be seriously damaged, some will be collapsed, some will be bulged, no matter which one it is, it will make the patient become less confident and produce a deep sense of inferiority; in addition, without the protection of the skull, the brain tissue is easily damaged, which will easily lead to abnormal cerebrospinal fluid circulation and blood supply disorders. The main purpose of the surgery is to replace the defective cranial bone with a material similar to human autologous cranial bone, to repair the bone window of the defective part, to realize the integrity of the cranium again, to restore the cranial cavity confinement, to keep the physiological intracranial pressure stable, to reduce the occurrence of cranial defect syndrome; through the defect repair, to achieve the symmetry of the head shape Through the defect repair, the head shape is symmetrical, the appearance is natural and beautiful, and the patient’s inner confidence is improved. In the neurosurgical guidelines, generally after 3 months of debridement surgery, the diameter of the defect is greater than 3 cm, which is in line with the indications for surgery, and the patient needs to be repaired in time. We use peek material to do cranial repair plastic surgery, using the new peek as the cranial repair implant material, which greatly reduces the postoperative rejection rate and infection rate; at the same time, we adopt the embedded repair method to effectively avoid the skin wear and ulceration and material exposure caused by the traditional titanium mesh covered repair; in addition, the innovative introduction of plastic surgery concept, combined with the unique mesh aperture design and unique intraoperative tissue separation reset In addition, the innovative introduction of the concept of plastic surgery, combined with the unique mesh aperture design and unique tissue separation and repositioning technology, effectively avoid temporal muscle atrophy, to ensure the activity of the tissues, to ensure that the postoperative head symmetry, to achieve a natural and beautiful appearance.