The best age of orthodontics depends on one's own growth and development. Generally speaking, it is best for girls to have orthodontics between 10- 12 years old, and it is best for boys to have orthodontics between 1 1- 13 years old. Because during this period, the facial development of minors is still in a period of rapid growth and development, orthodontics needs to make use of the potential of facial growth and development to ensure that the efficiency of tooth movement and alveolar bone reconstruction reaches the best state, so as to achieve perfect orthodontic effect.