Stage III breast cancer has a survival time of <2 years in most cases without treatment, and the five-year survival rate reaches 0% if it is treated. For the treatment of stage III breast cancer, preoperative chemotherapy can be used to reduce the stage, surgical treatment, postoperative chemotherapy to prevent proliferation. The chemotherapy regimen can be used: well-differentiated and early-staged use TC regimen, T is doxorubicin, C is cyclophosphamide. For poorly differentiated and late-staged patients, ECT regimen is used, E is epothilone, C is cyclophosphamide, and T is doxorubicin. The surgical plan for their stage III breast cancer is radical mastectomy. For breast cancer patients, early detection and early treatment, the earlier and more beautiful the treatment effect is better.