The orthodontic treatment of teeth is divided into early orthodontic treatment and conventional orthodontic treatment, early orthodontic treatment utilizes functional orthodontic appliances or movable orthodontic appliances for orthodontic treatment, and conventional orthodontic treatment uses archwires for orthodontic treatment. 1. Early orthodontic treatment: Before the growth and development period, blocking, correcting and guiding treatment are carried out for the malocclusion and malocclusion trend that has already been manifested. Changing bad oral habits using simple functional orthodontic appliances, such as the use of palatal spikes, palatal screen, lip block, buccal screen for correction. 2. Conventional Orthodontics: Orthodontics generally performed after the basic completion of the replacement teeth period, often using the mechanical force of the arch wire and bracket correction, first aligning and leveling the dental arch, then using the sliding method to close the gap, and then finally making fine adjustments. The way of orthodontic treatment is related to the age of the person and the severity of the oral malocclusion, and it is specifically recommended to go to the hospital for an oral examination first. Then according to the doctor’s advice to choose a suitable orthodontic method.