Control the intake of snacks: Foods that are good for oral health, such as harder, fibrous hard fruits, vegetables, and coarse grains, rub on the surface of the teeth when chewing and play a mechanical scrubbing effect, which can wipe away the bacteria stuck on the surface of the teeth and promote the development of the jawbone, which is conducive to the alignment of teeth. Oral cleaning: from the age of 4 months, a clean gauze wrapped around the finger can be used to gently massage the child’s dental bed. 1 year old parents use a finger toothbrush or toddler toothbrush to help brush the teeth, at least once a night. 3 years old, let the child brush himself, but parents should supervise, once in the morning and once in the evening, when the child will spit toothpaste froth use toothpaste, the size of a pea is sufficient. Feeding method: Breastfeeding is advocated during infancy to ensure children take in enough nutrition and improve the anti-caries ability of teeth. Control the time of using bottle for infant each time, generally limited to 10-15 minutes, and feed a small amount of plain water after each feeding to dilute the residual milk in the mouth and play the role of cleaning. Regular check-up: Children have high caries rate and rapid progress, when teeth and gums have problems at the very beginning, they often have no conscious symptoms and will be found only after doctor’s check-up, which can be basically solved by simple disposal or even scientific guidance of brushing teeth, but if it develops to the stage of lesion, besides suffering from the disease, it will cost more time and money, so it is very necessary to go to dentist every 3-6 months for checkup is very necessary.