Sclerosing adenosis (SA) of the breast is the late development stage of breast adenosis which is difficult to diagnose. Because its imaging manifestations are similar to malignant lesions of the breast, which often needs pathological diagnosis. Intravoxel incoherent motion(IVIM ) imaging is an MR method to separate diffusion and perfusion effects by fitting a double exponential model of signal attenuation and can accurately display the diffusion movement of water molecules. This study confirmed that some parameters of IVIM can be used in the identification of early breast adenosis and SA. Therefore, IVIM is of great value in the diagnosis of breast adenosis.