Clinically, it is found that more and more adults are coming into orthodontics for social, professional and aesthetic needs. Adult orthodontic patients are mainly divided into two categories, one is no other oral diseases, the main purpose of consultation is to align teeth and solve the aesthetic problems; the other category is accompanied by other oral diseases, such as periodontal disease, temporomandibular joint disease, etc.. Many people think that orthodontics can no longer be done above the age of 18. This statement is actually a misconception. Because the human alveolar bone is in a state of change throughout life, there is no restriction on orthodontic treatment at any age. However, because the alveolar bone repair ability of adults is lower than that of teenagers or children, the course of orthodontic treatment for adults is generally longer. At the same time, adults are often accompanied by dental caries, bad teeth, missing teeth, broken teeth, periodontal disease and systemic diseases such as hepatitis and diabetes, which will also bring certain difficulties to orthodontic treatment, the risk is relatively large, the cost is also relatively high, and the technical level of doctors is also put forward higher requirements. Therefore, when some adults go to some clinics or hospitals for consultation, they are told that adults cannot perform orthodontics, the reason is more due to the limited professional understanding and technical level of doctors. In the process of adult orthodontic treatment, some issues need to be paid much attention to: 1, aesthetic requirements: From the aesthetic requirements, adults are more inclined to the beauty of the mouth and lip area and the improvement of the overall appearance, very much the neat and symmetrical upper incisors, the restoration of the midline, the coordination of the proportion of the face and smile line. In adult orthodontics, some masking methods are used to minimize the social impact. In addition, if there are any abnormalities in the size of the teeth in the anterior region after the orthodontic treatment, attention should be paid to restoring the crown shape and trying to improve the lip-tooth relationship. In the choice of orthodontic appliances, we should also try to consider the aesthetic requirements, you can choose ceramic brackets similar to the color of the teeth, transparent resin brackets, etc. 2, psychosocial: adults orthodontic motivation and treatment mentality is more complex than that of children. They are more sensitive to the evaluation of people around them. The impact of treatment results on patients’ mental health and social behavior is also more prominent. Therefore, it is necessary to fully understand the motivation of treatment before treatment, pay attention to the psychological observation before treatment and carry out specific explanation work. For patients with psychological disorders, try to persuade them to undergo psychological counseling first. 3, the principle of applying force: adults have more resorption of the alveolar bone, clinical crown growth, so we choose to use light force in treatment. In the early stage of treatment, the use of light force can activate the activity of periodontal tissue cells, which is conducive to tissue remodeling . Later, as the treatment progresses, the force value will be increased gradually in order to obtain the most appropriate force for the individual. 4.Course of treatment and maintenance: When adults undergo orthodontic treatment, the course of treatment is often shorter than expected because they can actively and positively cooperate with the treatment, are sensitive to the response and can keep the oral hygiene clean. However, relatively speaking, adults have less adaptive remodeling ability and bone tissue metabolism ability than adolescents, slower tooth movement and longer adaptation time for the remodeling of perioral muscles, so the treatment course and maintenance time are relatively longer compared with adolescents, and some patients may also need lifelong maintenance.