Reverse jaw is mostly caused by the overdevelopment of the lower jaw, or combined with the retraction of the upper jaw, which is manifested in the teeth as the lower teeth biting in front of the upper teeth. The best time to correct it is the earlier the better, and it is recommended to intervene as early as possible once it is detected. The time for orthodontic correction can be roughly divided into three stages according to the different types of antimandibulars. First of all, the parents should develop proper breastfeeding and sucking postures, avoid biting the upper lip and mouth breathing habits, and correct them as soon as they are detected to prevent the formation of antomandibulars. If the child has already had a jaw rebound when it is discovered, the child can go to the orthodontics department of a specialized dental hospital at the age of 3-5 years after the complete eruption of the milk teeth to have a functional orthodontic treatment to prevent the mandible from developing forward. When the permanent teeth are fully developed at the age of 12-13 years, orthodontic correction of the permanent teeth is required. For patients who have bony antomandibular, orthognathic surgery should be performed when the upper and lower jaws are fully developed, and the timing of the surgery is after the age of 18. Reverse jaw not only affects the aesthetics of the patient, but also affects the normal chewing function and induces respiratory diseases, so it needs to be detected and treated as early as possible.