Scar excision plus skin grafting: it is impossible to directly suture a large area of scar after scar excision, because there are not many normal skins in such patients. Taking facial scar as an example, surgical scar repair can be divided into different areas according to the natural shape of the face (forehead, upper and lower eyelids, nose, upper and lower lips, mandible). Surgical scar repair can patch up a whole piece of skin in the natural shape area, and decide how many parts of skin to implant according to the amount of scar resection. There is also a surgical scar repair method suitable for patients with facial scar covering the whole face, that is, removing the whole facial scar at one time; Transplantation of whole skin can avoid scar formation at joints when skin grafting is carried out in different regions, and the appearance of surgical scar repair is better than that of skin grafting in different regions. It is best to use full-thickness skin graft or skin graft with subdermal vascular network, because the facial color will not be too dark after free transplantation and the cosmetic effect will be better.