The remedial measures for two-year-old baby tooth decay are as follows: 1. parents should urge baby to brush and rinse teeth regularly, and help baby clean the tooth surface if necessary, such as scrubbing the tooth surface with wet gauze, etc. 2. reduce the intake of sugar, eat less sweets and drink less lactic acid drinks to prevent the number of caries-causing bacteria in the mouth from growing continuously. 3. when superficial caries damage is formed in the milk teeth, smooth turning needle can be applied to adjust the grinding, and fluoride-containing drugs can be applied to prevent the expansion of caries. To avoid the expansion of caries. The newly erupted milk molars can be treated with sulcus closure or fluorine coating to prevent the occurrence of caries. 4.When the milk teeth form deep cavities, after removing the decaying matter, apply glass ionomer cementation to fill them. If the milk teeth have formed large area caries, metal preformed crown restoration can be made to restore the chewing function.