The chemotherapy AC-T regimen is generally applicable to breast cancer patients at high risk of recurrence and metastasis after surgery, and is generally used for locally advanced breast cancer. This chemotherapy regimen is generally used as adjuvant chemotherapy after radical surgery for breast cancer patients, and some breast cancer patients can also make use of this regimen to do preoperative neoadjuvant chemotherapy. AC-T chemotherapy regimen belongs to high-precision treatment plan, which is commonly used for adjuvant chemotherapy after radical surgery for breast cancer. AC refers to adriamycin drugs plus cyclophosphamide, and T refers to paclitaxel or docetaxel, during which nausea, alopecia, and other reactions may occur, and it is necessary to treat the symptoms in a timely and symptomatic manner under the guidance of the doctor to avoid causing relatively great harm to the body. The specific dosage of chemotherapy needs to be calculated according to the formula of the patient’s weight divided by the square of his height. Breast cancer patients should actively cooperate with the doctor’s treatment.