The main treatments for breast cancer include surgery, radiotherapy, chemotherapy, endocrine therapy and biologic targeted therapy, etc. For early stage breast cancer, surgery should be considered first, and the main surgical methods are breast preservation surgery and modified radical surgery, which currently tend to be breast-conserving surgery. For locally advanced breast cancer surgery, neoadjuvant chemotherapy can be done first, and then surgery can be done after the tumor shrinks. The main treatments for advanced breast cancer are chemotherapy, endocrine therapy and biologically targeted therapy. At present, it is believed that comprehensive treatment should be used for breast cancer to achieve the best treatment effect. Tumors larger than 5 cm or the number of axillary lymph node metastases greater than or equal to 4 should be considered for postoperative radiotherapy. Patients with risk of recurrence should consider post-operative chemotherapy, and endocrine therapy should be considered for receptor-positive patients. In advanced breast cancer, we should determine whether the tumor responds to hormone therapy before deciding whether to use chemotherapy or endocrine therapy. If the tumor responds to endocrine, endocrine therapy is first. If the tumor does not respond or the patient has symptoms of visceral metastasis, or the disease-free survival after surgery is relatively short and the patient is relatively young, chemotherapy treatment can be preferred.