Children need to protect their teeth from diet, oral cleaning and nutrition. The most common dental disease in children is dental caries, also known as tooth decay, which is related to children’s love of sweets, not rinse their mouths in time after eating, etc. Therefore, children should protect their teeth by firstly letting them eat less sweets, which include not only sugar, but also sweet fruits and other foods, and if the children eat these sweets, they should also rinse their mouths in time to rinse out the remaining sugar in the oral cavity. In addition, the child should also be allowed to brush their teeth every morning and evening, brushing should also pay attention to the way and method, incorrect brushing can lead to the child’s mouth gum recession, cervical wedge-shaped defects, etc., you can use a soft-bristled toothbrush through the arc brushing method to brush the teeth. In addition, since the development of children’s teeth is related to calcium, it is also necessary to pay attention to the balanced nutrition of children to avoid calcium deficiency. If there are any dental abnormalities, it is recommended to consult a doctor in time.