Iron deficiency anemia is mostly said to be preventable. The main thing is to pay attention to the food pairing, eat more iron-rich foods, such as black fungus, kelp, hairy vegetables, nori, shiitake mushrooms, pig liver, etc., followed by beans, meat, blood, eggs, etc. Animal foods not only have high iron content and high absorption rate; soybeans and soy products also have high iron content and absorption rate, food should contain a certain proportion of animal protein, increase the intake of fruits rich in vitamin C, etc., and iron pot cooking, which can increase iron source of iron. Large-scale parasite control in rural areas where hookworm disease is endemic; prompt iron supplementation for patients who have had a gastrectomy or gastrointestinal anastomosis. Blood donors should take iron supplements for one month after donating blood to speed up the recovery of iron. For long-term blood donors, iron supplementation should be insisted on even more. Iron deficiency anemia itself is not difficult to treat; its prognosis is determined by whether the primary disease can be cured.