The normal reference value of leukemia fusion gene is less than 0.1%. Clinically, the normal range of leukemia fusion gene is less than 0.1%, beyond which it can be judged as positive, which can suggest the occurrence of chromosomal translocation, etc., and the formation of leukemia fusion gene, which is of great significance for the diagnosis and treatment of leukemia. The chromosomes of leukemia patients may have certain specific fusions called leukemia fusion genes, such as the BCR-ABL fusion gene in chronic granulocytic leukemia. The appearance of these fusion genes helps to determine the type of leukemia and the selection of special treatments, which is very important for the diagnosis and treatment of leukemia patients, and it is recommended to seek help from professional doctors in time if there is such an abnormality. In summary, the normal value of leukemia fusion gene is generally less than 0.1%, if it is greater than this range, it is also necessary to consult a doctor in time.