When children have bad teeth, the following treatment measures can be taken: 1, the newly erupted milk molar and the first permanent molar fossa closure, to prevent the deeper fissure retained food residues, the formation of caries.2, regular fluoride treatment, improve the hardness of enamel, enhance the resistance to caries.3, strengthen oral hygiene, cleaning, develop the habit of regular brushing, rinsing, and to avoid eating before going to bed.4, regulate the structure of the diet, eat less sweets, drink less carbonated drinks, etc..5, regular oral examination, once caries occurred, timely repair.6, during the replacement of milk teeth, extracted as soon as possible, to induce carbonated drinks. Eat less sweets, drink less carbonated drinks, etc. 5, regular oral examination, once caries damage occurs, timely repair. 6, during the replacement of milk and permanent teeth, we should remove the retained milk teeth as early as possible, induce the smooth eruption of permanent teeth, and prevent the malocclusion. If premature loss of milk teeth occurs, a gap retainer can be worn.