The following treatments are needed when a two-year-old child has tooth decay:1. When extensive superficial caries damage occurs on the smooth surface of the milk teeth, it is necessary to use a carving needle to grind away the decayed tooth tissue, change the caries-causing environment, and apply fluoride-containing medication to induce the caries to settle down, and it is necessary to pay attention to correcting incorrect breastfeeding postures and cultivating children’s oral hygiene and cleanliness habits.2. When caries holes are deeper and cause pain in the face of cold, heat, acidity, and sweetness, it is necessary to grind away the decayed tooth tissue and prepare cavity shapes, and use glass ionized cementum and silver amalgam to fill the cavities. When the cavity is deep and painful to cold, hot, sour or sweet, it is necessary to grind away the decayed tooth tissue, prepare the cavity shape and fill it with glass ionomer cementum and silver amalgam.3. When pulpitis occurs in milk teeth, it is necessary to remove the pulp under local anesthesia and fill the root canal with calcium hydroxide paste. In order to prolong the service life of the baby tooth and to avoid residual roots and crowns, it is best to fabricate metal pre-formed crowns for restoration.