According to the main purpose of patient consultation, a brief description of the timing of orthodontic consultation for malocclusion is as follows: 1, distinguish between indications and non-indications: some temporary malocclusion formed by growth and development and malocclusion caused by bad habits, such as early attention, often can be adjusted on their own, or temporary observation, to determine the inability to adjust, then treatment can be carried out. 2, orthodontic treatment and the relationship between age and gender: children’s jaws are growing and developing, the bone growth is active, so the orthodontic effect is better, the earlier the type of malocclusion such as skeletal malformations affecting growth and development are orthodontically treated, the better. Puberty is different for men and women, girls are earlier than boys, so the time of orthodontic treatment for girls, such as the use of rapid growth and development period, orthodontic treatment should be slightly earlier than boys. 3, the relationship between health status and treatment: local and systemic state is good, normal tissue changes are bound to achieve better results, local inflammation and systemic chronic diseases on the movement of teeth, bone remodeling are in varying degrees of some degree of impact, generally should be local and systemic treatment before treatment is appropriate.