Most of the iron deficiency of seven-month-old babies is due to iron deficiency anemia caused by not adding complementary foods on time, so it is necessary to add complementary foods in a timely and reasonable manner, and to supplement more iron-rich foods, such as egg yolks, liver puree, fish puree, animal blood puree, soybean puree, meat puree and so on. If you are adapted to the pureed food, you can gradually convert it into minced meat and vegetables. If the degree of anemia is relatively severe, simple dietary supplements cannot completely correct the anemia, and iron supplements can be given if necessary. Therefore, if the child is given supplemental food and iron supplements on time and in a reasonable manner, it is important to go to the hospital every month for a hematocrit test to correct the anemia in a timely manner.