The treatment of iron deficiency anemia in children generally has different treatment recommendations and methods according to the degree of anemia. 1. Mild iron deficiency anemia (hemoglobin ≥90g/L): dietary therapy is recommended, and taking iron therapy is generally not recommended. Food therapy should be based on eating non-vegetarian food, such as egg yolk, red meat (pork, beef concentrate), chicken and duck blood, and pig liver. The iron contained in these non-vegetarian foods is heme iron, which is not disturbed by other foods during its digestion and absorption. Iron supplementation through vegetarian foods should be avoided with some foods, such as vegetables containing fiber, phytic acid, tea, coffee, etc. 2, moderate iron deficiency anemia (hemoglobin ≥ 60g/L, but <90g/L): on the basis of dietary therapy, it is recommended to take iron supplements for treatment. Ferrous iron supplements are more effective. Nowadays, iron supplements are generally ferrous iron supplements. When taking ferrous iron supplements, take vitamin C orally at the same time to facilitate iron absorption. The dose of oral iron is 4-6mg of elemental iron per kg of body weight per day. the best time to take the medicine is half an hour before meals, but some children take iron half an hour before meals, there will be stomach discomfort, vomiting and other phenomena, then can be changed to take the medicine between meals. When you start taking iron, you can start with a small dose, and if there is no adverse reaction, you can increase the dose to the full amount day by day. 3.Severe iron-deficiency anemia (hemoglobin <60g/L): when treated with dietary therapy and iron, if there is obvious weakness, dizziness, chest tightness, blackness in front of the eyes, or even fainting due to anemia, blood transfusion should be given. 4. Very severe iron deficiency anemia (hemoglobin <30g/L) (very rare): to be treated with blood transfusion. Food therapy and iron therapy that is necessary. After food therapy and iron therapy, the hemoglobin can rise 20g/L after 3 weeks, and after the hemoglobin is normal, at least adhere to food therapy and iron therapy for more than 2 months.