The conditions for breast cancer with breast preservation include early stage breast cancer with breast preservation needs, clinical stage I and II patients with some tumors less than or equal to 3cm, and a few clinical stage III patients whose stage is reduced by chemotherapy. Breast cancer in the early stage and patients with the need for breast preservation can preserve the breast. Patients with clinical stage I and II, the maximum diameter of the tumor is not more than 3cm, and the appropriate breast volume and shape can be preserved after surgical treatment. Patients with multiple lesions in the same quadrant and from the same source may also be considered for breast-conserving surgery. Patients in clinical stage III who have been downstaged to breast-conserving criteria by neoadjuvant chemotherapy and inflammatory breast cancer has been ruled out may be carefully considered for breast conservation. The conditions for breast cancer breast preservation treatment are relatively strict, because conservative treatment may result in the cancer cells not being completely removed, increasing the risk of postoperative recurrence, and the indications must be strictly mastered. Breast cancer is a relatively common malignant tumor in women. It is recommended that breast cancer patients should actively cooperate with their doctors for treatment, who will assess their conditions and formulate suitable plans.