1.Preventive treatment In the process of embryonic development and acquired development of teeth, jaws and craniofacial area, all kinds of congenital or acquired environmental factors can affect its development and cause malocclusion, and all kinds of preventive measures can be taken to prevent various malocclusions from occurring, which is the main content of preventive treatment. For example, mothers should pay attention to nutrition during pregnancy, use drugs carefully, avoid radiation exposure, etc., all of which can prevent the adverse development of the fetus. After the teeth eruption, children should have regular oral examination and early treatment, such as early prevention and treatment of dental caries, early elimination of bad oral habits, early loss of milk teeth, gap maintenance, and retained teeth, extra teeth timely extraction, etc. These preventive measures can prevent the occurrence of malocclusion. 2.Blocking correction Malocclusion is formed in the process of children’s growth and development. In the early stage of the occurrence of malocclusion, early correction through simple methods to prevent malocclusion to the direction of serious development, the development of teeth, jaws and face to normal is called blocking correction. Such as early replacement teeth found in serious crowding of the teeth with serial extraction method for the treatment of early origin of anterior teeth anticuspension using simple dental pads tongue reed orthopedic Hankou Shun orthopedic treatment, can prevent the development of malocclusion to the serious jaw deformity. 3, general orthodontic treatment General orthodontic treatment is the most commonly used method in orthodontic treatment. According to different types of malocclusion, different types of orthodontic appliances, such as removable orthodontic appliances, fixed orthodontic appliances, functional orthodontic appliances and so on, are chosen for orthodontic treatment. General orthodontic method is more complex, should be implemented by orthodontist to carry out. 4, surgical orthodontic treatment Surgical orthodontic treatment refers to the completion of growth and development, serious bony malocclusion malocclusion using surgical orthodontic method, also known as orthognathic surgery or surgical orthodontics. Surgical orthodontic treatment must be done by the cooperation of oral and maxillofacial surgery and orthodontics. This is done to ensure that the relationship and jaw deformity are well corrected.