Scar is the inevitable product of tissue healing process after trauma, it not only affects the aesthetics of people, but also causes local deformity and dysfunction by contracture, once hyperplastic scar or keloid occurs, it is easy to grow repeatedly and hard to get rid of, and repeated breakage of scar can lead to malignant transformation and scar cancer. How to treat keloid scars through surgery? 1. The treatment of keloid scars is closely related to their location, distribution, degree of contracture and patient’s expectation. Smaller scars located on the face can be excised and sutured directly, and satisfactory results can be obtained with fine suturing techniques. 2. For larger scars on the face, because of aesthetic considerations, soft tissue skin expansion can be chosen to repair the trauma left after scar excision by enlarging the adjacent normal skin, and the expanded skin is consistent with the surrounding normal skin in terms of texture, color and sensation, with good postoperative results. 3. The scar located in the joint area and affecting the function needs to solve the functional obstacle first, and then consider the appearance. The restoration of function mainly depends on the release of the scar, and the desired effect can be achieved clinically through scar reshaping, skin grafting and flap transfer. The treatment of scarring is a complex and tedious process that often requires multiple treatments with different means to achieve satisfactory results.