The treatment of breast cancer caused by breast ducts is based on the early and advanced stages of the cancer, and the appropriate treatment is chosen. 1. Early and middle stage breast cancer: For early and middle stage breast cancer, where the cancer cells have not spread and only a single malignant tumor has appeared, surgical treatment is preferred. Surgery can choose modified radical surgery or breast-conserving surgery. 2. Middle and late stage breast cancer: for middle and late stage breast cancer patients who have other abnormalities. Chemotherapy can be chosen first, and then surgery can be performed after the lump is reduced. According to the patient’s condition, individualized treatment is implemented. 3. Advanced breast cancer: prolong the survival period and improve the prognosis of advanced cancer patients through systemic treatment, such as immunotherapy and targeted therapy. Patients should actively cooperate with the treatment, take medication as prescribed by doctors and have a healthy diet in order to improve the therapeutic effect and prognosis. Regular review should be conducted to detect metastasis as early as possible and provide timely treatment.