In recent years, with the improvement of living standard, the increase of high-fat food intake, the effect of environmental hormones and the increase of life pressure, the incidence of benign and malignant tumors in women’s breast worldwide has shown a significant increase, and breast cancer has become the first incidence and the second mortality rate of malignant tumors in women; women’s pursuit of beauty has also put forward higher requirements for breast surgery, how to remove breast lesions while minimizing the impact on breast appearance has become the goal of breast surgeons. Breast surgeons are striving to remove breast lesions while minimizing the impact on breast appearance. To date, this technique has been used in thousands of hospitals worldwide and hundreds of thousands of patients have undergone surgery. The principle of minimally invasive surgery: A 2-5 mm skin incision is made and a special vacuum rotary cutter is inserted to remove the tumor under the guidance of ultrasound or mammography. Advantages of minimally invasive surgery: precise positioning and accurate removal of lesions: the whole surgery is performed under the guidance and monitoring of high-resolution ultrasound, so the accuracy of the surgery is guaranteed to the greatest extent, especially for tiny tumors (as small as 3 mm) that could be detected by ultrasound in the past but could not be reached by clinicians during physical examination, which could only be observed in the past due to the limitation of technical level, and then operated after they grew up, or performed Large-scale excision, tiny incision, good cosmetic effect: Compared with the incision of 3-5 cm in traditional surgery, the incision of McMurdo surgery is only 2-5 mm, which is difficult to detect; moreover, multiple tumors in the same side of the breast can be removed through one incision (less than 3, distance not more than 10 cm). Less tissue damage and faster recovery: avoiding cutting through skin, subcutaneous tissue and normal glands, which is especially advantageous for deep breast tumors and obese patients. Short operation time, light pain and short hospital stay: 10-30 minutes for a single tumor, free movement after surgery, and discharge in 2-3 days. Low incisional infection rate: the application of electrocoagulation to stop bleeding in conventional surgical incisions is likely to cause fat liquefaction, and surgical sutures remain in the incision as foreign bodies, which are risk factors for incisional infection and poor healing; McMurdo surgery causes little damage to normal tissues and no foreign bodies remain in the body, which significantly reduces the risk of infection. Indications for surgery: 1, benign breast masses <2 cm. 2. Breast masses (<2 cm) of unknown pathological nature that require excisional biopsy. Surgery in the 21st century has entered the era of minimally invasive surgery, and due to the significant technical advantages of the McMurdo system, it is foreseeable that in the near future, minimally invasive surgery will become the standard surgical procedure for excision and biopsy of benign breast tumors!