Generally speaking, there is no food or medicine for preventing leukemia, and it can be prevented by regular medical checkups, keeping away from chemical pollution, avoiding exposure to ionizing radiation, and so on. 1. Regular medical checkups: Leukemia is a blood disease. If there is a genetic history of leukemia in the family, or if there are patients with other blood diseases, it is recommended to have regular medical checkups, so that intervention or treatment can be carried out as early as possible when abnormalities are found. 2. Stay away from chemical pollution: paints and coatings used for home decoration contain benzene, formaldehyde and other chemical substances, and children should stay away from polluted environments. Newly renovated houses and newly bought furniture should be ventilated for a period of time to dissipate the smell before they can be used. The use of drugs should pay attention to the safety, should not be unauthorized abuse of drugs. 3. Avoid exposure to ionizing radiation: prolonged exposure to ionizing radiation such as X-rays and γ-rays may also induce leukemia, and children should avoid exposure to ionizing radiation. It is recommended to help children develop good living habits, pay attention to dietary health, and once discomfort occurs, they should seek medical examination in time.