Before 6 months of age, parents should feed their infants 1 or 2 spoons of warm boiled water with a small spoon after each meal (not necessarily swallowed whole) in order to keep the mouth clean, reduce food residues and minimize the occurrence of dental caries. After 6 months has begun to grow teeth, parents are advised to use a finger toothbrush with warm boiled water, preferably after breastfeeding or every night before bedtime on the newly erupted teeth from the lip surface to the tongue gently scrubbing and rubbing, so that it adapts to clean the oral cavity, and can be gently massaged gums, so that it feels comfortable. Be careful to use it when the infant is in a good mood. Avoid causing aversion to brushing. Parents should not be anxious about the few infants who are not teething, and it is okay that they are not. Tooth growth is related to nutrients such as protein, calcium, phosphorus, fluoride, vitamin C and vitamin D, and thyroid hormones. Adhere to supplement cod liver oil, more sunshine, ensure balanced nutrition, add supplemental food reasonably, promote chewing and stimulate gums, help increase normal physiological stimulation of teeth and jaws, promote development and establish good eating habits, if necessary, use grinding rod to make the teeth can penetrate the gingival mucosa and erupt smoothly. After the age of 1, parents continue to insist on the use of finger toothbrushes, with the increase in the number of teeth, children should be consciously trained to open their mouths and brush their teeth, so as to avoid biting their fingers. There is a so-called “physiological salivation” during tooth eruption, mainly caused by the stimulation of the trigeminal nerve when the teeth eruption increase in salivary secretion, but because there is no habit of swallowing a lot of saliva, the mouth is shallow, saliva is often flowed to the outside of the mouth, pay attention to the preparation of more than a few bibs, wetting anytime after replacement. Can also be trained to feed more water with a spoon. So that it can consciously swallow saliva, and this phenomenon will naturally disappear with age. 1.5 years old with the increase in the number of teeth and bite force should pay attention to eat more vegetables and fruits. Promoting chewing is beneficial to the normal development of the dental arch. Replacement of small toothbrushes with bristles to help young children brush their teeth should be introduced to the child, even if he does not know how to brush his teeth, it serves to familiarize him with the applicability of the toothbrush. Brush teeth without toothpaste and continue to use cool white water. After the age of 2, after brushing their teeth at night before going to bed, slowly begin to teach young children the correct way to brush their teeth, up and down vertical brush, each tooth should be brushed on 3 sides, up and down, front and back, inside and outside of each part of the brush. Brush for at least 3 minutes each time, use a soft-bristled toothbrush and a small amount of fluoride toothpaste after the milk teeth come out; it is conducive to the protection of teeth, prevention of dental caries, regular replacement of toothbrushes. Eat less sweets and candies, rinse your mouth after eating meals and snacks, and brush your teeth in the morning and evening. Every six months to check the teeth, if necessary, feasible fossa closed, found that caries timely treatment, in order to prevent small cavities into large cavities. Only by protecting the milk teeth is the beginning of having healthy permanent teeth.