Postoperative anemia is mostly hemorrhagic anemia. Apart from promptly stopping bleeding and administering blood transfusions, dietary supplementation can also promote the rapid recovery of red blood cells and improve anemia. Therefore, it is possible to include blood-enriching foods such as lean meat, pork liver, pig's blood, and iron-rich vegetables like black fungus, spinach, and rapeseed, as iron is a crucial raw material for synthesizing hemoglobin. Additionally, it is necessary to consume more fresh vegetables and fruits, which are rich in folic acid and vitamin B12, also essential raw materials for the recovery of red blood cell production. Therefore, these nutrients can be appropriately supplemented in daily diet.