There are many possibilities for dental and maxillofacial growth restriction and high incidence of malocclusion during growth and development from infancy to adulthood, and early prevention and treatment of malocclusion is very important. Early diagnosis and treatment is limited by the age and growth period of the child, and early preventive intervention is recommended. Prevention and treatment (age 0-6 years old): 1, infancy prevention, mainly from the feeding habits, sleep habits, and found to have oral habits as early as possible to correct, to avoid affecting the normal growth and development of the jaw and face; 2, childhood prevention, this is the fastest time for the whole body and craniofacial jaw growth and development, the intake of rich nutritious food and a certain degree of hardness of food and growth and development is closely related. Avoid partial diet, establish good oral hygiene habits, correct brushing is the key to healthy growth of children. Preventive orthodontic treatment is necessary for early loss of permanent teeth, retention of milk teeth, abnormal eruption of permanent teeth, abnormal attachment of lingual ligament and labial ligament, etc. Symptomatic treatment is necessary in time. Interceptive orthodontic treatment (age 6-12 years old): It is a simple orthodontic treatment for ongoing or newly occurred malformations such as abnormal number of teeth (emergence of multiple teeth, congenital missing teeth), bad oral habits such as finger biting and chewing, or unilateral chewing, etc. Orthodontic orthodontic treatment (adapted to ages 12-30, including the optimal age of 12-17) is the most common orthodontic treatment method, depending on the different dental and maxillofacial malformations choose various types of orthodontic orthodontic appliances, including functional braces or fixed braces. At this time, the difficulty is greater, the treatment method is more complex, the treatment time is longer, and should be performed by an orthodontist. Surgical orthodontic treatment (for ages 18 years and older), for adults with severe bony malocclusion requires surgical methods combined with orthodontic treatment to correct the bony deformity. The implementation of any orthodontic treatment requires consultation and cooperation between the specialist and the patient.