Forty-five days of chemotherapy after breast cancer surgery is usually not late, but it can not be generalized, there is no strict requirement for the time of chemotherapy after breast cancer surgery, it needs to be determined by the doctor according to the patient’s condition, recovery, physical fitness and so on, whether it is possible to have chemotherapy for 45 days after surgery. Some breast cancer patients need chemotherapy after surgery to control the development of the disease, completely remove malignant tumor cells and achieve clinical recovery. The time for chemotherapy is not clearly defined clinically. If the patient recovers well after surgery, chemotherapy can be administered earlier; if the patient recovers poorly after surgery, it may take 45 days or more before chemotherapy can be administered. The time of chemotherapy should be determined according to the patient’s condition. If the patient is in the early stage of the tumor when the surgery is performed, the patient’s condition is not very serious, but the patient’s physique is relatively weak, usually the time of choosing chemotherapy after the surgery should be delayed appropriately, and chemotherapy should be carried out 45 days after the surgery, which is not too late. Patients should take good care of themselves after the operation and strengthen nutrition to make their body recover as soon as possible so as to carry out chemotherapy. After breast cancer surgery, if there is any discomfort, patients should go to the hospital in time and follow the doctor’s advice to choose the appropriate time for chemotherapy.