Skull repair is a kind of surgery for skull defect, which is a residual skull defect due to cranial injury, surgical decompression or surgical removal of osteoma. If the defect is more than 3cm in diameter, patients often have dizziness, headache, local tenderness, irritability, restlessness, etc. Some patients also have fear, fear of the sun, fear of vibration and even fear of loud noises, often have poor self-control, poor concentration, memory loss, or depression, fatigue, reticence, low self-esteem, etc. Especially when standing, the skull is sunken, and the image of appearance is frightening, which will seriously affect the patient’s life and work. Cranial defect appears, in order to reduce the harm brought by cranial defect to patients, the timing of cranial repair should depend on the patient’s general and local conditions, if the patient is a depressed comminuted fracture, the repair can be completed at the same time after the removal of collapsed bone fragments, for cranial defect caused by cranial injury debridement and decompression, cranial repair is usually done about 3 months after surgery. What other materials are used for cranial repair of cranial defects besides titanium? The new PEEK material is also chosen as the material for cranial repair, because PEEK is superior to traditional cranial repair materials. This technology first scans the patient’s skull through CT, and then 3D prints the PEEK repair material that matches the size and shape of the skull defect area, and then surgically mounts it perfectly on the patient’s defective skull to achieve effective mechanical protection of the brain tissue and restore a beautiful and natural appearance, paving the way for the patient to regain a happy life.