As far as the current medical understanding is concerned, skull repair has at least the following 5 benefits: 1.Fixes the cranial cavity content volume, stabilizes the external environment of the brain, avoids unnecessary oscillation of the brain tissue, and is very beneficial to the further recovery of brain cells. 2.Restore the normal anatomical relationship of local tissues, improve local blood circulation, and facilitate the functional improvement of locally injured brain cells. 3.Isolate the direct adhesion between scalp muscles and brain tissues to prevent secondary epilepsy. 4.Protect local brain tissues to prevent re-injury of fatal injury. 5.Restore the skull shape and aesthetics. Modern neurosurgery has mentioned the importance of the first point above to a very high degree, and clinical observations in recent years have shown that cranial repair has a very important role in improving the brain function of patients, a large part of which is due to the first reason. Therefore, the view that “skull defect can be repaired only after at least 1~2 years” has been completely overturned, and our current experience is that skull repair can be considered 2~3 weeks after the condition is stabilized, with good results and low surgical risks.