Low-grade ductal carcinoma in situ belongs to the early stage of the disease and has a relatively good prognosis. Ductal carcinoma in situ usually refers to the malignant tumor cells only infringing and damaging the ductal epithelial cells, without breaking through the basement membrane, infiltrating and spreading. Low-grade ductal carcinoma in situ usually refers to the patient’s cell nuclei with mild heterogeneity and pleomorphism, without necrosis, and the prognosis of this case is relatively good. Patients with low-grade ductal carcinoma in situ can be cured by surgically removing the diseased area. Patients with this type of disease usually have a good prognosis of recovery, but they have to receive postoperative auxiliary treatment according to the doctor’s instructions and undergo regular review. Patients with ductal carcinoma in situ should have timely treatment to avoid aggravation of the disease.