The skull is an important protective barrier at the periphery of the brain, which protects the brain from external aggressions. The skull also provides important support and protection for the intracranial environment, as well as for the head and facial organs. Therefore, the importance of cranial bone to the whole body is self-evident, and if cranial defect occurs, then cranial repair should be performed in time. Can neurosurgery perform cranial repair? It should be noted that cranial repair is usually performed by neurosurgery. Cranial repair is a routine procedure in neurosurgery and the technique is very mature. The purpose of cranial repair is to reconstruct the complete closed cranial cavity, reshape the stable intracranial environment, and provide important protection for the cerebrospinal fluid circulation, blood circulation and neurological functions in the cranium, which is also important for the health of the whole person and the life operation of the body. Therefore, it is very necessary for patients to have skull repair surgery in time after skull defect occurs. A Mr. Li from Shandong suddenly fell during an overhead work and suffered a serious cranial injury, which was resuscitated by a craniotomy in the emergency room of a local hospital. After the rescue surgery, a part of the skull defect was left behind, with a defect area of about 5 cm x 6 cm. Doctors at the time did not recommend skull repair surgery because they did not think the defect was too large. However, in the following year, Mr. Li often felt dizzy and headache, and was very uneasy in his heart, always worrying about being hit or bumped by the outside world and injuring his brain, which had a lingering shadow and obstacle in his heart, so he finally decided that he should undergo skull repair as soon as possible. Mr. Li came to Beijing after many inquiries and visited us, and our team performed peek cranioplasty to restore his skull intact, and his dizziness and pain disappeared, and his mental state was renewed with very satisfactory results. Our team extensively performs peek cranioplasty using peek material which is very advanced and has excellent performance. Moreover, the team constantly carries out technical improvement and innovation, material optimization and design, and innovatively introduces the concept of aesthetic plastic surgery, which can achieve good results of anatomical integrity, functional perfection and beautiful appearance, and is widely praised and recognized.