The maintenance of normal blood red blood cell function requires the combined action of several appropriate levels of trace elements. Among the trace elements, iron, zinc, copper, cobalt and manganese are all related to anemia. Iron is a component of hemoglobin and other important systems of the body. Iron deficiency can cause anemia due to insufficient hemoglobin synthesis. There are many iron-rich foods, including animal liver, meat, animal blood and fish. The general recommended intake for adults is 15 mg per day. Zinc is a component of zinc-containing metalloenzymes in the body, which can promote the body’s metabolism, enhance appetite, participate in the metabolism of nucleic acids and proteins, regulate immune function, and also enhance the regenerative capacity of creative tissue to speed up the healing of injuries and surgical sites. When zinc is deficient, children have slowed growth, anorexia, and low immune function. Zinc deficiency can cause poor absorption of iron, anorexia, and aggravation of iron deficiency due to infection factors, which can cause small cell hypochromic anemia. Oysters, lean meat, fish, etc. are rich in zinc. Zinc is known as the “spark of life” and the daily intake of zinc is 14.5 mg. Copper catalyzes the synthesis of hemoglobin, and copper-containing enzymes – copper blue protein can promote the absorption and transfer of iron. Copper deficiency can also cause anemia. Containing more copper are animal liver, nuts, beans, oysters. The daily requirement of human copper is 1.3 mg. 4, manganese manganese can increase the use of copper, there is a synergistic effect of hematopoiesis, lack of manganese can affect the use of copper, can cause anemia. Tea contains the most manganese, other high manganese containing foods such as nuts, grains, coffee, etc. The daily requirement of adult manganese is 4.4 mg. 5, cobalt element cobalt has to promote the absorption and metabolism of iron and zinc elements, promote the role of erythropoietin production, is to maintain the vitamin B12 involved in the generation of red blood cells as an effective component. Cobalt also has the role of promoting the synthesis of hemoglobin and the development and maturation of red blood cells. The main dietary sources of cobalt are animal products, including various kinds of seafood, bee dense, meat and so on. The average person needs to consume 0.39 mg of cobalt daily.