It is not recommended for two and a half year old infants to correct dental geodesy because the best time for correction is three to four years old. Teeth circumcision is a common clinical symptom of malocclusion, the upper front teeth are wrongly located on the back side of the lower front teeth, the front teeth have no occlusal function, the upper alveolus and the upper lip is retracted. The child should go to the orthodontics department of the hospital between the age of three and four years old to use movable orthodontic appliances for orthodontic treatment. At this stage, the root of the child’s baby teeth has been fully developed, and the degree of cooperation with the treatment is improved compared with that at the age of two and a half years old, and it can be restored in about 3-5 months, with a good orthodontic effect. If the child misses the optimal time for correction, the circumcision may hinder the normal development of the front and backward direction, the treatment difficulty and the treatment effect will be greatly reduced, and it will have an adverse effect on the child’s mental health and growth and development.