Malocclusion in children is a result of genetics, disease, caries, abnormal tooth development and bad oral habits such as finger sucking, tongue spitting, lip biting, mouth whistling, night grinding, lateral chewing, etc. during the growth and development period. The malformation of teeth, jaw bone and facial development. Patients with malocclusion can develop various oral diseases such as dental caries, gingivitis and periodontitis. And it also affects the chewing function of children, which is not conducive to digestion, pronunciation and language communication. 1.Establish good living habits; 2.Children’s teeth misalignment should be actively treated for caries of milk teeth, protect the first permanent molars, restore children’s chewing function, and prevent misalignment caused by insufficient chewing function and insufficient jaw development; 3.Extract multiple teeth and retained milk teeth, and prevent the influence of abnormal tooth development on occlusion development; 4.Help children overcome bad oral hygiene habits, take appropriate care and psychological If necessary, use orthodontic appliances. 5, actively treat rhinitis, tonsillar hypertrophy, upper whistle infections and other diseases to remove the mouth whistle. 6.For children who chew on the lateral side, after treating oral diseases, help children to strengthen the use of the waste side and release bad habits. 7, on the issue of children’s misaligned teeth, because most parents lack sufficient knowledge of misalignment, or teeth are not painful and ignored, so often miss the opportunity of early prevention and treatment. However, if regular oral examination can be carried out, it will be detected in time and prevented under the guidance of dentists. 8, to reduce malocclusion, have a good mouthful of teeth, or maintain the effect after orthodontics, the most critical thing is to strengthen the use, such as eating hard food, food with more fiber or knocking teeth. Women tend to have malocclusion again in adulthood due to poor bite function. When is it time for children’s malocclusion treatment? The best time for orthodontic treatment in children is divided into the functional orthodontic period (6-12 years old) and the fixed orthodontic period (12-18 years old), which dentists call the “golden period”. This is because the plasticity of bone tissue in children is strong, the bone gap has not yet fused, the jaw bone is gradually growing, there is enough growth for bone tissue reconstruction.