Low field nuclear magnetic resonance（NMR） technology, a new nondestructive testing method, has advantages such as rapid, accurate and pollution-free.Microporous starch is a new type of modified starch, its surface has a uniform countless holes, has the very good adsorption characteristics.It can absorb grease, pigment and other substances.Low field nuclear magnetic resonance method can test in a short time and need not solvent.Its operation is simple, accurate and high reliability.The first determination of the microporous starch adsorption properties provides a kind of high efficient and advanced methods for the future research of adsorption properties of the microporous starch.