Children’s teeth erosion is very painful mainly due to the progress of caries involving the pulp or periapical tissue, need to be timely root canal treatment, if necessary, need to extract the affected teeth. Children’s teeth corrosion is mainly due to long-term eating sweets and do not pay attention to oral hygiene and thus lead to dental caries, manifested in tooth color, shape, quality changes. When the bacteria in the caries attack the pulp and even the periapical tissues, spontaneous pain can occur, and the pain is more severe in the acute stage. Because of the possible presence of milk teeth and young permanent teeth in children’s mouth. Different treatments are needed for teeth involved at different times. 1. If the baby teeth are involved, root canal treatment should be carried out in time to prevent the involvement of the lower permanent embryos. If the lesion has already involved the lower permanent tooth germs or caused severe interspace infection, it can be extracted after evaluation by the surgeon to prevent further progression of the lesion. 2. If a young permanent tooth is involved, a complete root canal followed by apical induction molding should be performed to promote root development, and restorative treatment should be performed when the tooth reaches adulthood. When the lesion is too large to be retained, the tooth should be extracted in time and the gap should be maintained to provide space for later restoration. In daily life, parents need to remind or help children to maintain oral hygiene to prevent caries; regular oral examination in the stomatology department, early treatment of diseased teeth, so as to minimize the impact on children’s growth and development.