According to the survey, about 90% of children aged 6 in China suffer from tooth decay, and each child under 12 years old has one decayed tooth on average. In order to reduce the chance of children’s dental caries, it is suggested that we should pay attention to children’s oral hygiene from the age of 0, and we should use children’s special toothbrush from the age of 2 to do a good job of dental care from childhood. Brushing is the main method to keep the oral cavity clean, it can eliminate the soft white dirt, food debris and part of the plaque in the oral cavity, and it has the effect of massaging the gums, thus reducing the disease-causing factors in the oral environment and enhancing the disease resistance of the tissues; brushing has an important role in the prevention of various oral diseases, especially in the prevention and treatment of periodontal disease and caries, etc. At the age of 6 years, the first permanent teeth of children have already appeared, so special attention should be paid to dental cleaning. It is recommended to choose a toothbrush with cup bristles and soft bristle edge to completely surround each tooth to achieve thorough cleaning; after 8 years old, children are in the stage of tooth replacement, and milk teeth and permanent teeth exist at the same time, plus the gap between teeth is large, if you do not pay special attention to children’s brushing habits, tooth decay will easily occur. It is also important to pay attention to the choice of toothbrush, which should have soft and mixed bristles to help clean the teeth and gaps thoroughly. It is generally advisable to choose nylon silk bristles toothbrushes for children, which are soft bristles and will not wear teeth and gums; the head of the toothbrush can be chosen from oval, oval rectangular, avoiding the use of pointed shape.