Anemia in a six-year-old child is when the child’s hemoglobin is below the normal range. The most common type of anemia in six-year-old children is iron deficiency anemia, because children are in the growth and development period, the demand for iron is large, if the diet does not add iron-rich food in time, iron deficiency anemia is easy to occur, after children suffer from iron deficiency anemia, the first thing to give supplemental iron treatment, commonly used are two-dimensional ferrous granules, compound three-dimensional ferrous oral solution, ferrous lactate and so on. At the same time, they should eat more iron-rich foods, such as animal liver, pig’s blood, sheep’s blood, shiitake mushrooms, black fungus and so on. In addition to iron deficiency anemia, anemia in children can also be caused by other blood system diseases, such as aplastic anemia, acute leukemia, etc. Anemia caused by this condition requires specialized treatment, such as cyclosporine, androgens and other drugs for aplastic anemia, and chemotherapy for anemia caused by leukemia.