Gadolinium oxide is widely used in the medical field mainly because it plays a crucial role in magnetic resonance imaging (MRI) contrast agents and the manufacturing of medical equipment components. In MRI contrast, gadolinium oxide is a key raw material for producing contrast agents. Gadolinium ions can shorten the relaxation time of protons in surrounding tissues, significantly improving the image contrast, which helps to clearly observe brain tumors, vascular lesions, abdominal organ lesions and so on. It is vital for the early diagnosis and precise treatment of diseases. Moreover, new gadolinium-based nano contrast agents also have application prospects in cutting-edge fields such as molecular imaging. In terms of medical equipment components, it has good high-temperature resistance and corrosion resistance. It can be used to make shielding materials in X-ray equipment and radiation therapy equipment to reduce radiation leakage and ensure the safety of personnel. It is also used in some high-precision medical sensors, which can improve the stability and sensitivity of the sensors and are used to detect weak signals in living organisms.