Currently, there are 2 kinds of repair materials used in cranioplasty: autologous tissue and allogeneic materials, the former is made of the patient’s own ribs, iliac bone, or skull, and the latter is implantable materials such as polymers and metals. Autologous tissue 1, advantages: autologous bone tissue reaction is small. 2, disadvantages: need to be in the bone donor area and implant area in two places of surgery, increase the patient’s pain and plastic effect is poor. Allogeneic materials: 1, metal cranioplasty sheet such as stainless steel plate and mesh, tantalum plate or titanium alloy plate and mesh have strong compressive properties, tissue compatibility is also good, with thermal conductivity, sharp edges are easy to penetrate the scalp and have the disadvantage of affecting the x-ray examination. 2, flat plexiglass by heating and shaping as a repair material, has the advantage of convenient and easy to implement, but the higher requirements for plastic surgery orbital, nose root and other places is not good, at the same time, poor compression strength is easy to break. 3, plus network enhanced silicone rubber is a new type of cranial defect repair substitute, according to the nature and size of the defective parts of the cut, the application is convenient, the disadvantage is that the strength is not enough, easy to collapse.