Triple-negative breast cancer refers to the postoperative pathological type, estrogen receptor-negative, progesterone receptor-negative and HER2 receptor-negative, and it is a kind of breast cancer with a higher degree of malignancy. Clinical symptoms are typical, painless breast lumps can be found, which gradually increase in size within a short period of time, and can be combined with orange peel-like changes of breast skin and bilateral nipple asymmetry; axillary lymph node metastasis can easily occur at an early stage, and also manifested as fusion of axillary lymph nodes, obvious swelling and pain, and the patient can also manifest numbness of upper limbs, or even have the symptom of oedema. For triple-negative breast cancer, the most effective treatment is radical mastectomy. After the postoperative pathological results are returned, intravenous chemotherapy should be chosen in time, in order to prevent early recurrence and metastasis after surgery.