Iron deficiency in infants is a common nutritional disease in children. Once an infant is found to be iron deficient, the cause of iron deficiency in infants should be found first, and then the degree of anemia should be determined. Once diagnosed with iron deficiency anemia, treatment should be given, and the treatment principle is to remove the cause and supplement iron, as follows: 1. Improve the diet, increase iron and vitamin C intake, and infants should add supplementary food in time to prevent partial eating. At present, there are iron-fortified milk powder, candies, beverages and cookies available in China for children of all stages. If the child’s iron deficiency anemia is due to improper feeding and the anemia is mild, it can be corrected through dietary therapy. The foods with the highest iron content are black fungus, kelp, animal blood and liver, followed by meat, beans, eggs and green leafy vegetables. Breast milk is not high in iron, but the absorption rate is as high as 50%, so breastfeeding is strongly advocated. 6 months old children should add iron fortified rice powder; 2. actively supplement iron for anemia, 4mg-6mg of elemental iron per kg per day. there are many common iron supplements, such as ferrous sulfate, ferrous fumarate, iron fumarate, dry syrup, etc. The anemia can be corrected by 3-4 weeks of iron treatment. Usually, after 4 weeks of taking iron, you have to go to the hospital for rechecking the blood routine and wait until the hemoglobin is normal, then still insist on taking iron for 2 months to reserve iron.