The infusion time of postoperative chemotherapy for breast cancer mainly depends on the chemotherapy regimen, usually around 1~4 days. Some breast cancer patients need to cooperate with chemotherapy to consolidate the therapeutic effect after surgery. The specific chemotherapy regimen is related to the type of pathology, clinical stage, and patient tolerance level, and the infusion time is related to the drug regimen. For example, the AC treatment regimen, which is mainly treated with a combination of two drugs, adriamycin and cyclophosphamide, is usually completed in 1 day of infusion. In contrast, the TCbHP treatment regimen, due to a wider variety of drugs and to mitigate the side effects associated with chemotherapy, may require 4 days to complete the infusion. Meanwhile, if the patient is in poor physical condition or in discomfort, hospitalization for infusion and observation will need to be prolonged. To summarize, chemotherapy regimens may vary under different circumstances, so the specific infusion time is not fixed, and it is recommended to take into account one’s own situation and follow the guidance of healthcare professionals.