The restoration and reconstruction of dental morphology and function remains the basic goal of orthodontic treatment. When examined from the aesthetic point of view, it includes both visual aesthetics such as neatness, symmetry, harmony and coordination of tooth alignment, and sensory aesthetics such as health, comfort and stability of mouth and teeth function. In the orthodontic clinic, patients complain that they want to correct the misalignment of teeth and restore the function of teeth, but the deeper hope is mostly out of the beauty of appearance. The love of beauty is a human instinct and the most sensitive feeling of the patient’s heart rather than an extravagant demand. With the development and progress of society, people need to communicate and interact widely, and the beauty and health of the mouth and teeth not only affects the functions of speech, digestion and respiration, but also affects their social and physical and mental growth to a large extent. Tweed, a renowned orthodontist, wrote after reading a letter from a child who was deprived of one of his life’s greatest treasures – the growth of his personality – because he could not close his lips naturally due to the protrusion of his maxillary teeth and thus developed an inferiority complex and was ashamed to meet people: “The world should be a happy place for children to live in, if If their physical and mental health and future marriages are hindered by malocclusion, as orthodontists, we should do everything we can to restore their happiness, even if there is a slight possibility.