Low hemoglobin is mostly considered as anemia, and iron deficiency anemia is common in babies aged 6 months to 3 years, mostly due to untimely supplementation after birth or unreasonable addition of supplemental food. If the hematocrit is lower than 110g/L, oral iron supplements, such as dextran iron oral solution, can be given, one per time, twice a day. At the same time, full-term infants should be given iron-fortified food supplements, infant iron-fortified rice powder. After 5-6 months of age, iron-rich foods such as egg yolk, liver puree, fish puree, animal blood puree, meat puree, etc. can be added gradually, and after a period of supplementation, attention should be paid to monitoring hemoglobin.