The characteristics of modified radical mastectomy for breast cancer include: first, the breast has to be completely excised, and the breast cannot be preserved; second, the surgery of complete excision of the breast is more traumatic; third, in theory, it can achieve the purpose of radical tumor treatment. At present, this surgery is a more thorough way to treat breast cancer, but because of the large trauma, the proportion is gradually decreasing; fourth, there are more postoperative complications, such as upper limb edema and shoulder joint mobility disorders caused by axillary clearance; fifth, during the surgery, the surgical risk is also greater than other surgical methods, for example, when clearing the axillary lymph nodes. Fifthly, the surgical risk is also greater than other surgical methods, such as the removal of axillary lymph nodes, which may damage important nerves and blood vessels, which is also a characteristic of modified radical breast cancer surgery.