Breast cancer patients with leukopenia after intravenous chemotherapy should be given drugs to enhance leukocytes, including oral drugs and subcutaneous injections, commonly used recombinant human granulocyte colony-stimulating factor injections, and also need to monitor the changes of blood routine. Oral medication can be vitamin B4 tablets, shark liver alcohol tablets and Ricodrine tablets, and can also be combined with traditional Chinese medicine, which also has the effect of assisting in improving immunity and boosting white blood cells. During the period of intravenous chemotherapy, pay attention to drink more water, eat more vitamin-rich food, multi-fiber food, can also speed up the metabolism of drugs, reduce the occurrence of adverse drug reactions. In serious cases, it is easy to combine with bone marrow suppression, especially when the chemotherapy cycle is longer, it is also easy to have platelet drop and so on, if necessary, it is also necessary to carry out blood transfusion and other symptomatic treatment.