Minimally invasive breast surgery – vacuum-assisted mastectomy, commonly known as “mastectomy knife”, can complete the one-time removal of breast fibroid tumors under 3 cm, and does not leave a scar after surgery. At present, our department has completed 169 cases and successfully removed 207 benign breast tumors. The incision is about 3 mm long and is usually made in a relatively hidden area. No suture is needed and there is almost no scar after surgery; 2. It does not affect the aesthetic appearance of the breast and causes little damage to the milk duct; 3. All operations are guided by ultrasound, fine and accurate; 4. The patient can resume normal work the next day.