Intraductal breast cancer is treated by modified radical mastectomy, endocrine, molecular targeting, etc. If the examination determines that the cancer is intraductal breast cancer, the treatment will choose manual treatment. Compared with radical mastectomy, modified radical mastectomy is less invasive, and the fat and lymph nodes under the skin will be removed during the surgery, and the pectoralis major and pectoralis minor muscles can be preserved, so the postoperative effect is more ideal. Endocrine therapy, also known as hormone therapy, is a chemical produced by the body’s endocrine cells. When ingested, the drug will circulate throughout the body with the bloodstream, thus killing the remaining tumor cells in the body. It can also be treated by molecular targeted therapy, which is a means of malignant tumor treatment. Through molecular targeted therapy, it can intervene in the growth and development of the tumor and can prevent the tumor from spreading.