The mouth is the first gate of human digestive system, if there are no healthy teeth to chew the food, the stomach and intestines will have to bear too much work, which will affect the nutrient absorption, and then affect the whole body growth and development of children. Pronunciation depends on the joint cooperation of lips, tongue and teeth to complete, if there are too many caries in childhood, then pronunciation and learning language will become a problem. Children’s milk teeth also play a pivotal role in facial beauty. A child with a mouth full of rotten teeth will be reluctant to smile and speak, and his or her mental health will be affected. In addition, the baby teeth of childhood also reserve space for the inherited permanent teeth to erupt and guide the permanent teeth to erupt in their normal position. Therefore, the viewpoint of “the baby teeth will be replaced anyway, so there is no need to treat caries” is extremely wrong, which not only affects children’s chewing, beauty and pronunciation, but also affects the development of children’s teeth and facial bones, affects children’s overall health, and indirectly affects children’s psychological health.