Abstract: A method for preparing a modified starch as an alternative to hydroxypropyl distarch phosphate, including: (a) evenly mixing a cassava starch with a buffer solution to obtain a starch suspension with desired pH; (b) adding ?-amylase into the starch suspension for enzymolysis of glycosidic bonds followed by deactivation to obtain a first enzymolysis product; (c) adding hexose oxidase into the first enzymolysis product for lactonization of gluco-oligosaccharides followed by deactivation to obtain a second enzymolysis product; and (d) subjecting the second enzymolysis product to centrifugation, washing and freeze drying to obtain an enzymatically-modified cassava starch.