Tooth erosion in small children is categorized into caries, reproducible pulpitis, irreversible pulpitis and apical periodontitis according to whether it penetrates the pulp cavity or not. Depending on the situation, root canal treatment followed by filling or direct filling treatment is considered. 1. Dental caries. Children’s teeth corrosion, if not through the pulp cavity to form cavities, need to go to the hospital in time to remove the decayed material, resin filling repair. 2. Reproducible pulpitis. When the tooth erosion close to the pulp cavity, may appear similar to the symptoms of pulpitis, the outside world of cold and hot stimulation of transient sensitivity to pain, the need to remove the decayed material after the use of clove oil medication to pacify the pulp, to be free of symptoms, and then cushion resin filling. 3. Irreducible pulpitis and periapical inflammation. Tooth decay has caused obvious symptoms of pulpitis or pulp necrosis, resulting in apical periodontitis, need to carry out root canal treatment first and then asymptomatic resin filling. Children’s teeth corroded, it is recommended to go to the hospital in a timely manner to avoid deepening of caries affecting oral health.