Abstract: MRI has excellent soft tissue resolution, and this technology is more and more widely used in breast disease diagnosis in recent years.Blood supply and perfusion through the microvascular network of tumor can be imaged noninvasively by dynamic contrast-enhanced MRI and perfusion-weighted imaging.Diffusion-weighted imaging and magnetic resonance spectroscopy can provide molecular information of breast lesions.Magnetic resonance ductography provides a new technology for detecting intraductal breast lesions.With MRI technology maturing and the rapid development of software and hardware, MRI shows its unique advantages in breast lesions characterization.