Invasive breast cancer intermediate-grade ductal carcinoma in situ is recommended to undergo comprehensive examination, and if surgery is possible, then timely surgical treatment should be carried out, and chemotherapy can be used after surgery to cooperate with the treatment. Invasive breast cancer intermediate grade ductal carcinoma in situ should first undergo comprehensive examination to evaluate whether it can be operated or not. If it can be operated, it should be actively operated, including breast-conserving surgery and modified radical surgery; after operation, chemotherapy, radiotherapy and even targeted chemotherapy can be added for adjuvant palliative treatment. Some patients need to take oral endocrine drugs for a long time to achieve the purpose of systemic treatment, and patients also need regular review to observe the condition, and if other symptoms occur, timely treatment can be carried out. In case of advanced invasive ductal carcinoma, such as metastasis to lung, brain and bone, conservative treatment can only prolong the survival period. For this kind of disease, one should accept treatment in regular hospitals with positive and optimistic attitude, pay more attention to diet, try not to consume spicy and stimulating food, eat light and nutritious food, and do proper exercise to strengthen one’s physical condition and develop a good life and diet habit.