For children, the following can be used to supplement iron: First, give children foods with high iron content, such as applying lean meat, duck blood, chicken blood and fish to children, which are rich in iron and have a higher absorption rate. Secondly, children should be given iron-fortified supplementary foods, such as iron-fortified rice flour. Again, children can be given oral iron supplements, commonly used iron supplements mainly include ferrous succinate, ferrous gluconate, iron fumarate and so on, these drugs can play a good effect of iron supplementation. Finally, children need to eat more leafy greens because they are rich in vitamin C, which helps iron absorption.