In the clinic, we have encountered many patients with facial acne scars of different shades after puberty, and some of them are very obvious, especially some boys who do not pay attention to facial cleaning and care after acne, resulting in local scarring and facial unevenness, which seriously affects appearance and even self-confidence. Traditional facial grinding treatment is more traumatic, takes a long time to heal, is painful, and tends to leave behind facial discoloration, and the results are not particularly ideal. In recent years, the emergence of fractional laser technology, when applied to the treatment of acne scars, has achieved very obvious results. Fractional laser technology is the newest and hottest technology in the United States in the last two years, and is also the most popular skin care technology in the global skin industry. Fractional laser treatment was first published in 2004 by Dr. Rox Anderson, an expert in laser medicine at Harvard University, and was immediately recognized by experts around the world and quickly applied in clinical practice. Fractional laser treatment uses a laser to make tiny holes in the skin that cause a series of biochemical reactions in the skin. Compared to traditional lasers, fractional laser is more powerful and can directly reach the deep dermis of the human face, stimulating the damaged part of the dermis to repair and proliferate, causing the dermis to produce more collagen and rearrange it. When these tiny laser beams are applied to the skin surface, they stimulate the growth of collagen and elastic fibers in the subcutaneous dermis, thus filling in the pits, tightening the skin and eliminating acne scars. Since the fractional laser treatment only covers part of the skin tissue and the newly made holes do not overlap each other, some of the normal skin is preserved and recovery is accelerated. Patients can return to normal life after four to five days.