Breast nodules are graded on ultrasound at the following seven levels: level zero, which refers to incomplete assessment and requires further confirmation; level one, which refers to negative findings and results that do not need to be described; level two, which are benign findings and signs of benignity should be described; level three, which are probably benign findings with a very low likelihood of malignancy; level four, which are suspicious of malignancy and biopsy is recommended; level five, which are highly suspicious of malignancy; and level six, which are clearly malignant and have pathological The possibility of malignancy is confirmed. Breast ultrasound can observe the size, shape, boundary, number, texture, activity of breast nodules, and the possibility of surface skin, which is convenient, simple, safe, easy, non-invasive, and suitable for the diagnosis of different breast diseases in patients of all ages.