Compared with foreign treatment of tumors, the involvement of TCM in the treatment of cancer is a recognized advantage in our oncology community. However, there is still the issue of the best timing for TCM treatment of tumors. As most patients have metastasis, many breast cancer patients receive radiotherapy and chemotherapy after surgery, which will cause damage to bone marrow, gastrointestinal mucosa, liver and kidney. In addition, after the completion of the prescribed chemotherapy, the patient will be treated with the same treatment. In addition, after the completion of the prescribed course of chemotherapy and radiation dose, even if there are no pathological changes and clinical manifestations of recurrence and metastasis, TCM should help to eliminate the evil and consolidate the therapeutic effect, and should not stop the drug prematurely.