Pre-pregnancy hemoglobin 70g/L is diagnosed as moderate anemia in pregnancy, which can cause adverse effects on both mother and child, and is usually more serious. Pregnant women with peripheral blood hemoglobin <110g/L diagnosed as anemia in pregnancy, when hemoglobin is 100-109g/L, diagnosed as mild anemia; 70-99g/L for moderate anemia; 40-69g/L for severe anemia; 40g/L or less for very severe anemia. Anemia can lead to anemic heart disease and susceptibility to infection in pregnant women, resulting in fetal growth restriction and fetal distress. Therefore, if anemia in pregnancy is diagnosed, treatment should be initiated promptly, including iron supplementation and correction of the cause of the anemia. This can be done by increasing the intake of iron-containing foods, oral administration of polysaccharide iron complexes, etc. Blood transfusion is required if necessary. If anemia in pregnancy develops, it should be seen promptly and treated as prescribed.