With the improvement of living standards, people’s diet structure has changed, food gradually become soft and sticky, many 4, 5-year-old children have milk teeth caries or pulpitis. Milk teeth health care: young children should start brushing their teeth when they have teeth in their mouths, but because young children’s swallowing function is not yet fully developed, this time should be implemented by parents on behalf of oral health measures: 1.5 years old, parents can use their index fingers wrapped in gauze to help children clean the various surfaces of the teeth that have erupted. 1.5 years of age, parents can use a children’s special toothbrush for children brushing their teeth at this time, because the child is prone to swallow toothpaste, so only water and toothbrushes can be used. Use only water and a toothbrush. Parental care and patience are important during this period of care. Anterior caries: many children appear “incisors” black, caries, mostly due to children do not brush their teeth, or do not rinse their mouths after eating milk at night, medically referred to as “bottle caries”, for the prevention of this situation: teeth eruption should start brushing their teeth, and if you can not rinse your mouth after drinking milk at night, you should drink some water and rinse your mouth. If you can’t rinse your mouth after drinking milk at night, you should drink some water to rinse out the milk stuck on your teeth to avoid bacterial growth and dental caries. Although milk teeth can be replaced, when caries occurs, it is important to consult a doctor in time to prevent pulpitis and pain in the future, and to prevent inflammation from spreading to the permanent tooth embryo, thus affecting the development of permanent teeth. The development of jawbone also follows the principle of “use in, use out”, due to the current children’s diet is more soft, jawbone development is insufficient, resulting in the jawbone development can not meet the teeth arrangement, crowding, misaligned eruption and so on.