In medical science, skull defects need to be repaired through surgery to solve, when it comes to surgery, parents are worried about the risk, especially when the child is so small, parents are even more intolerant. But in fact, cranial repair surgery is a routine surgery, from the use of technology has become very mature, as long as the regular hospital to let experienced experts to operate is no problem. There is another point, the choice of skull repair materials should also be noted. At present, many local hospitals are using titanium mesh material for skull repair. Compared with the previous material, titanium mesh material is really progressive, but it is still inevitable that some sequelae and discomfort may be caused after surgery, and there is a risk of material exposure, which requires secondary surgery and more pain for patients. Children’s cranial bone repair should be more cautious, to choose good materials, good hospitals and experts. The current clinical introduction of a new type of polymer material – peek material to do surgery. This material has various properties such as histocompatibility, hardness, elasticity, heat insulation, etc. It is comparable to human skull and is the ideal material for doing cranial bone repair surgery at present.