With the awakening of women’s awareness of their own health and the continuous improvement of medical technology, the number of breast cancer patients, especially the younger ones, is increasing. In order to eradicate the disease, patients must undergo surgery. In order to prevent recurrence and metastasis, the surgery must cut as much and as clean as possible. The “breast cancer patient must have her breast removed” treatment has been deeply rooted in people’s minds, and many people believe that if they have breast cancer, they must lose their breast. Since the first breast cancer surgery, mastectomy seems to be the conventional way to treat women with breast cancer. However, for female patients, removing the breast will cause great physical and mental trauma, but breast preservation is worried that the cancer cells will not be removed thoroughly enough, which will affect the survival and worry about recurrence. In fact, breast-conserving surgery has been included in the surgical treatment guidelines as early as the 1990s. However, for a period of time, once detected, most of the breast cancer patients in China were in the middle or late stage, and only in the first-tier cities and some areas with better medical resources could they have the opportunity to truly achieve early detection and treatment of breast cancer. Once breast cancer is detected, many patients have already missed the best time for breast-conserving surgery; in clinical work, we have indeed seen those who insist on breast-conserving despite all odds. Whether breast cancer patients are really suitable for breast-conserving treatment needs to be judged by professional doctors, and patients should generally meet the following conditions: 1. single tumor: tumor diameter is less than 3 cm, i.e. a single lesion in one breast with clear boundary and no axillary lymph node metastasis; 2. tumor location: tumor edge is more than 3 cm away from the nipple, not under the nipple or areola, which is convenient for post-operative repair and keeping the breast 3.Post-operative physical condition and economic condition: the patient can receive comprehensive post-operative treatment including radiotherapy and long-term follow-up; 4.Comprehensive assessment of the size of the tumor and the ratio to the breast, and consideration of the post-operative effect, and the fuller breast is more suitable; 5.The patient himself has a strong demand to keep the breast hospital. Whether breast cancer needs to be removed or not, and the impact of removal on treatment effect and survival, it is recommended to discuss with professional doctors and decide whether to cut or not.