When a cranial defect occurs, it is obvious that the patient’s appearance will be seriously damaged, some will be collapsed, some will be bulged, either way, the patient will become less confident and have a deep sense of inferiority; in addition, without the protection of the cranial bone, the brain tissue will be 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 confinement of the cranial cavity, 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, the general debridement procedure is more than 3 months old and the diameter of the defect is greater than 3 cm, which means that it meets the indication for surgery and the patient needs to be repaired in time. Although cranial repair is a routine neurosurgical procedure, it is also a large craniotomy, and it is recommended to go to a large public hospital for surgery. It is known that many hospitals commonly carry out titanium mesh cranial repair, selecting titanium mesh as the cranial implant material, but because of the implantation of titanium as a metal material and the use of covered repair, there are many postoperative complications such as the rate of rejection infection and the exposure of abrasive skin material. In view of this, after years of clinical exploration and summary, our hospital upgraded and improved the original cranial repair technology to form a mature technology-peek material cranial repair plastic surgery, which uses the new peek as the cranial repair implant material, greatly reducing the postoperative rejection rate, infection rate; at the same time, the embedded repair method, effectively avoiding the traditional titanium mesh cover repair caused by In addition, the innovative introduction of plastic concept, combined with the unique mesh aperture design and unique tissue separation and reset technology, effectively avoid temporal muscle atrophy, ensure the activity of the tissues, ensure the symmetry of the postoperative head shape, and achieve the purpose of natural and beautiful appearance.