Abstract: The D301 resin used to decolorize hsian-tsao gum was selected on five types of ion exchange resin and macroporous absorption resin, and the optimum conditions were carried out. The best result for decolorizing hsian-tsao gum was determined as follows: the volumn of resin was 3%, decolorization time was 3h and decolorization temperature was 50℃, under which the decolorizing rate reached 95.5% and the loss of polysaccharide was 15.5%.