Tooth rotten with a big hole, also known as dental caries in medical science, is a disease of chronic progressive destruction of hard tissues of teeth under the influence of bacteria. Clinically, it can be divided into superficial caries, medium caries and deep caries, and the treatment methods of different degrees of caries are different. Generally for the first two symptoms are light, can choose conservative treatment, for the symptoms are serious, has no meaning to stay teeth, suggest extraction treatment, specific as follows: 1, resin filling: also is often said to fill teeth, generally applicable to shallow caries, medium caries and other small degree of damage caries, at present, the clinical mostly use composite resin filling to treat dental caries. During the treatment, the cavity around the hole and the damaged tissues are removed first, and then the cavity is filled with appropriate materials such as composite resin and glass ion cementum to achieve the treatment purpose of restoring the original form and function of the tooth, which can not only prevent the cavity from expanding, but also have no obvious effect on normal diet; 2, root canal treatment: if the deeper medium caries and deep caries develop into pulpitis or periapicalitis, root canal treatment is needed. Root canal treatment is needed. This kind of caries usually has a big hole, so it needs to clean the pulp tissue and infected material first, then disinfect, then fill the root canal, and finally close the cavity, which can also achieve the purpose of treatment; 3.Extraction: For the teeth with poor effect of the above treatment or have no use value, it is recommended to extract the tooth for treatment, and after the damaged tooth is extracted, you can choose the appropriate material for implant treatment. Because teeth are usually more fragile after treatment, teeth may split when eating and biting, so some patients need to wear braces during treatment to assist in treatment, wearing braces can play a protective role and also help to improve the color of teeth. At the same time, we should pay attention to oral hygiene in our daily life, brush our teeth in the morning and evening, minimize the consumption of spicy and stimulating foods, and rinse our mouth after eating to avoid the accumulation of food residues and bacteria that can cause further damage to the teeth.