Breast calcification is a localized deposition of calcium salts in the breast tissue, which appears as a dense white shadow on molybdenum target and may be caused by benign or malignant diseases of the breast. Benign diseases such as plasma cell mastitis, fibroma, intraductal papilloma, etc. usually present as coarse, homogeneous, well-defined foci. Benign calcification is mostly due to localized hyperplasia of breast tissue, and the relative insufficiency of local blood supply leads to necrosis at the edge of the hyperplastic foci, which produces calcium deposits after mechanization. Malignant diseases, such as breast cancer, often result in calcification as small, uneven density foci with unclear margins. Malignant calcified foci are mostly caused by calcium secretion from cancer cells or ectopic calcification of the tumor. It is recommended that patients consult a specialist in time to choose the appropriate treatment plan based on the imaging description and other clinical data.