Invasive breast cancer grade 3 chooses appropriate treatment according to the stage as well as the type of pathology, including including surgery, radiotherapy, endocrine therapy, targeted therapy and so on. 1. Surgery: Breast-conserving surgery can be used for treatment, which preserves the nipple and areola and removes only the breast tissue, including the tumor area. After surgery, combined treatment with radiotherapy and chemotherapy can achieve the effect of radical cure. 2. Chemotherapy: chemotherapy is used to kill breast tumor cells, inhibit the growth and reproduction of tumor cells and promote the differentiation of tumor cells in the treatment of invasive breast cancer grade 1. However, killing tumor cells may kill normal cells and immune cells at the same time. Commonly used chemotherapy drugs are paclitaxel, cyclophosphamide and so on. 3. Radiotherapy: radiotherapy can reduce the recurrence rate of breast cancer in localized areas and improve the overall survival rate, and the irradiation program of radiotherapy should be decided by doctors according to patients’ individual conditions. 4. Endocrine therapy: including drugs such as toremifene, raloxifene, exemestane, etc. The specific choice of drugs should be determined by the doctor. 5. Targeted therapy: including Trastuzumab, Lapatinib and so on. It is also suggested that if breast cancer occurs, it is recommended to diagnose and treat it as early as possible, so as to avoid the spread and metastasis of breast cancer, which will affect the treatment effect. Normally, you should pay attention to develop a healthy and regular life, and quit smoking and drinking. Maintain a happy mood, avoid overwork, and do proper exercise, such as jogging, walking, playing tai chi, etc., to improve the immunity of the body.