Cranial defects are partly caused by open craniocerebral injuries or firearm penetrating injuries, and some patients have residual defects due to debridement or resection of diseased cranium. In recent years, the proportion of cranial defects has increased due to the favorable results of debridement for severe traumatic brain injury patients. After cranial defects, firstly, patients are subjected to all kinds of external finger-pointing due to aesthetic problems, resulting in low self-esteem and depressed psychological disorders. Secondly, patients may suffer from dizziness and headache, memory loss, and fear of loud noises. In addition, it may also cause complications such as brain bulging, brain atrophy, hydrocephalus, etc., which will pose a major threat to the patient’s life and health. Therefore, timely cranial repair surgery can not only make patients recover health as soon as possible, but also reduce the psychological pressure of patients to a certain extent. Cranial bone repair is a relatively simple neurosurgical operation with fast recovery. From the point of view of current technology, there is basically no risk during the operation, and it can basically meet the requirement of covering the defective area, but the postoperative effect of repair and recovery time varies according to the implantation material and the repair method. We perform polyetheretherketone peek cranioplasty, using the new peek as the implant material, taking the embedded repair method, and formulating a personalized plan (repair + plastic surgery), and the overall shape of the patient’s postoperative effect is good. The surgery itself is a very rapid recovery, the next day after the operation, you can get out of bed, five to seven days can be discharged from the hospital, plus preoperative examination of two to three days, the whole recovery time is basically about half a month.