Prostate MRI is highly accurate in diagnosing prostate cancer disease, and can also see the size of the prostate, whether it is calcified or not, and whether it is hyperplastic. It can help the doctor to have a better judgment and diagnosis of the patient’s prostate type of disease. Magnetic resonance is non-invasive and non-radioactive, which can minimize the harm to the human body. Magnetic resonance has high resolution on soft tissues, which can obviously differentiate between normal tissues and foci tissues, and it has high accuracy in diagnosing prostate cancer diseases, and it makes the foci tissues more clearer and locates them more accurately by means of three-dimensional imaging. Through magnetic resonance examination of prostate, high-quality and high-resolution images of prostate can be obtained, which improves the accuracy of diagnosing prostate cancer. Through the observation of prostate by magnetic resonance, and combined with other relevant examinations in clinic, it can diagnose whether there is prostate cancer or not, and determine the size, scope, and presence or absence of calcification of prostate cancer foci. It is recommended that patients suspected of having malignant prostate disease routinely need to undergo prostate MRI.