Scar tissue is an inevitable product of the process of human trauma repair. Although the exact mechanism of scar formation is not yet fully understood, most studies believe that it is mainly due to the impaired regulatory mechanism of tissue repair and regeneration during the healing process of skin trauma, which leads to abnormal fibrosis of trauma repair. Textbooks and clinicians mostly suggest that patients must wait for 6 months – 1 year for the scars to mature before undergoing surgical treatment —- including excision, skin grafting, flap repair, etc. Before that, they can only receive compression therapy, hormone injection, silicone membrane, isotope, topical cream treatment, etc. Many patients regard these treatments as These treatments are seen by many patients as a “reprieve” for the lack of effective treatment by doctors, which is slightly biased but not unreasonable. In the last decade, advances in laser theory and technology and clinical applications, especially the fractional photothermolysis theory and the development of ultra-pulsed CO2 fractional laser technology, have allowed burn plastic surgeons to intervene in the early stages of scar formation. The principle is to apply an exfoliative CO2 fractional laser for minimally invasive surgical treatment. Each beam of light acting on the epidermis and/or the scar forms a central exfoliative zone and a surrounding thermal coagulation zone and forms a microthermal treatment zone [MTZ], which in turn induces the scar tissue to initiate a trauma repair mechanism that can modulate collagen synthesis within the scar and induce an orderly arrangement of new collagen. The skin around the micro-hole remains intact, and the well-preserved skin acts as a “bridge” during repair, achieving the goal of treating the scar without creating a new one. The clinical practice of fractional laser scar surgery in the burn unit of Changhai Hospital proves that early laser minimally invasive surgical intervention can change the pathological process of scars and reduce the functional impairment, sensory abnormalities (pain, itch) and poor appearance caused by scars. The latest international opinion is that fractional laser minimally invasive surgery can be used to treat scarring one week after wound healing or stitch removal to achieve early intervention and shorten the course of the disease.