Deep overjet cannot be self-corrected. Deep overjet is an odontogenic developmental problem and a bony developmental problem that needs to be treated by orthodontics. The developmental problems and bad habits that occur in deep overjet are the cause of the change in the teeth. Self-orthodontics cannot be realized because there is no sustained force to move the teeth. The method of orthodontic treatment for deep overjet is to categorize according to the degree of deep overjet, and take braces or surgical orthodontic treatment. For the precursor symptoms of deep overjet caused by bad habits, it is possible to prevent and correct them by self-control and changing the bad habits effectively. Once dental and bony problems are formed, it will be more difficult to self-correct in the later stage, and it is necessary to cooperate with passive orthodontics to move and improve the teeth. If you have deep overjet, try to go to the orthodontic department of regular hospitals to have a relevant examination, according to the different degrees and types, and give the correct orthodontic program.