Iron deficiency in pregnancy can be supplemented by oral iron supplements, iron injections and dietary treatments. 1. Oral iron is effective, safe and inexpensive, pregnant women can take ferrous succinate, polysaccharide iron complex for drug supplementation therapy. However, it should be noted that the use of folic acid iron complex drugs can not replace the prevention of fetal neural tube defects oral folic acid. 2. Injectable iron is mainly used for pregnant women who are intolerant to oral iron, poor compliance or ineffective, among which iron sucrose is the most commonly used and safe, with better efficacy, but it is forbidden for people in early pregnancy, history of iron allergy, chronic liver disease, acute and chronic infections. 3. Dietary treatment refers to dietary guidance to increase iron intake and absorption. Iron absorption depends on the iron content of the food, physiological requirements and bioavailability. Foods containing iron include red meat, fish and poultry. Foods rich in vitamin C, such as cauliflower, carrots and cabbage, fruits, potatoes, and green leafy vegetables, can promote iron absorption. During pregnancy, due to the increased iron requirements and poor absorption of pregnant women, it is important to supplement iron therapy in a timely manner so as not to cause bleeding intolerance conditions.