Pre-colonial leukemia can improve immunity through dietary regulation, physical exercise and medication. 1. Dietary regulation: Reasonable and sufficient nutrition is the key to improve immunity, and should ensure the reasonable intake of sugar, protein, fat and various trace elements. You can give foods rich in high quality protein such as quail eggs, yogurt, soy milk, lean meat and fresh vegetables and fruits such as tomatoes, grapes and so on. Avoid spicy and cold foods such as chili peppers and ice-cream. 2. Physical exercise: adhere to the physical exercise can effectively improve the body’s immunity, but need to pay attention to the choice of fewer people, fresh air places. 3. Drugs: Some special chronic leukemia patients can use immunoglobulin, thymic peptide, interferon and other drugs under the guidance of doctors. There may be other ways to improve immunity in the early stage of chronic leukemia, and it is recommended to do so under the guidance of a doctor. The above drugs should be used reasonably under the guidance of a doctor and avoid self-medication.