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Magnetic resonance imaging is a new imaging technology based on the hydrogen’s magnetic resonance feature. Gradient module should have high calculation speed and accuracy to complete massive computation work including rotation transform, eddy compensation and shimming in a very short time. We make a deep exploration into the gradient module from its function, real-time and accuracy requirements. Then, we propose and realize a novel gradient module based on high performance DSP. Experiments indicate that the gradient module we designed satisfies the function, real-time and accuracy requirements. It provides a practical gradient module solution for the development of digital Spectrometer.