With cranial defect, 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 will make the patient become less confident and produce a deep sense of inferiority; in addition, the loss of cranial bone protection, the brain tissue is easily damaged, which will easily cause 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 cranial bone again, to restore the cranial cavity confinement, to maintain the physiological intracranial pressure stability, 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 3 months after debridement surgery, the defect diameter is greater than 3 cm, which is in line with the indications 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 titanium mesh cranial repair is commonly carried out in many hospitals, and titanium mesh is selected as the cranial implant material, but because titanium is implanted as a metal material and covered repair is used, there are many discomforts such as rejection infection rate and exposed abrasive skin material after surgery. In view of this, after years of clinical exploration and summary, we upgraded and improved the original cranial bone repair technology to form a mature technology – PEEK material cranial bone repair, which uses the new peek as the cranial bone repair implant material, greatly reducing the postoperative rejection rate, infection rate; at the same time, the embedded repair method, effectively avoiding 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.