Children’s dental fillings generally have no disadvantages and hazards, but there may be some risks. For example, children are active and do not cooperate well, which may cause damage to the oral mucosa. When children’s teeth are decayed, it may cause tooth nerve infection and then pulpitis of milk teeth, causing tooth pain and loosening, affecting daily life, and even causing facial infection. Therefore, after dental caries occurs, the teeth are usually filled, for the carious part of the first thorough removal, and then use the filling material for restoration, need to be in the regular clinic or hospital for filling. If children can not cooperate well with the doctor for filling, the filling tool may cause damage to the oral mucosa of children; children’s saliva secretion is more, which may cause the phenomenon of accidental inhalation or choking. After filling, children should go to the hospital in time if they have pain, hot and cold stimulation pain, avoid biting too hard food in their daily life, limit the intake of sugary food, and maintain oral hygiene to prevent the recurrence of dental caries.