In recent years, breast-conserving surgery has become the main treatment method for stage I and II breast cancer in Europe and the United States, and in 1969, Rissanen reported that the 5-year and 10-year survival rates of breast cancer treated with local tumor resection plus radiotherapy of the breast and axillary area were similar to those of radical surgery plus postoperative radiotherapy, which provided a guarantee for the widespread implementation of breast-conserving surgery. As the standard of living improves, breast cancer patients’ desire for breast preservation is becoming stronger and stronger, especially in developed European and American countries. The aim of breast-conserving treatment (breast-conserving treatment) is to achieve the same chance of survival as radical surgery, while preserving the relatively perfect appearance of the breast to improve the quality of life, while requiring a low recurrence rate of the affected breast and a good cosmetic result. This natural, relatively normal appearance has an immeasurable impact on the patient’s personal psychological feelings, personal life, family life and social life, and may be irreplaceable not only for the individual patient, but also for the patient’s family and many individuals and groups with whom the patient is in close contact.