Preventive measures for leukemia in the elderly include: avoiding exposure to radioactive substances such as X-rays; avoiding exposure to harmful chemical substances such as formaldehyde and phenol; balanced nutrition and eating more vitamin-rich food; and moderate exercise to enhance physical fitness. 1. The specific pathogenesis of leukemia in the elderly is not clear, but radioactive substances, harmful chemical substances, autoimmune abnormalities and other factors may be related to the development of leukemia in the elderly. Therefore, patients need to avoid contacting a lot of X-rays and other radioactive substances. 2. The formaldehyde and benzene content in some newly renovated houses exceeds the standard, and adequate ventilation is needed to reduce the formaldehyde and benzene content before moving in; avoiding hair dyeing can reduce the incidence of leukemia in the elderly to a certain extent. 3. Elderly people should have balanced nutrition and eat more vitamin-rich food, such as green leafy vegetables, kiwi fruit, etc. Meanwhile, moderate exercise according to their physical condition can enhance their immunity and reduce the incidence probability of leukemia in the elderly to a certain extent. Elderly people are advised to consult the hematology department and be guided by specialists to actively prevent the occurrence of leukemia in the elderly.