Iron deficiency during pregnancy can affect the growth and development of the fetus and requires timely treatment. With the continuous growth and development of the fetus during pregnancy, the fetus’s demand for nutrients will increase, when the mother’s iron deficiency will cause maternal anemia, resulting in a decrease in placental blood supply, moderate to severe anemia, the nutrients and oxygen provided by the placenta can not meet the growth needs of the fetus, which can easily cause fetal growth restriction, fetal distress, preterm delivery, stillbirth, etc., and also affect the long-term development of the fetus, which should be treated in a timely manner. The common clinical treatment is iron supplementation, mainly oral administration, commonly used drugs include polysaccharide iron complex capsule, ferrous sulfate tablets, ferrous succinate tablets, etc. In serious cases, blood transfusion can also be considered. It should be noted that drug treatment should be carried out under the guidance of a professional physician, patients should not blindly use drugs, so as not to lead to adverse consequences.