Children’s brushing should start from the time there are teeth erupting, only 1 to 2 at first, with children’s toothbrush and children’s toothpaste, mother gently brush every morning and evening with a brush, children’s toothpaste baby does not spit out also does not matter. Tooth brushing is very important, the decay of milk teeth will affect the eruption of permanent teeth, we must pay attention to the health of milk teeth. It is important to treat the decay of the milk teeth in time and to save the milk teeth until the normal time of shedding. If the milk teeth fall out early, it will cause difficulty in eruption of permanent teeth or the erupted sixth-aged teeth will drift forward and block the eruption of other permanent teeth, resulting in severe crowding of teeth, skewed jaws, and skeletal developmental deformities such as geodontia.