8.09%和71.21%。The optimum processing conditions of the lentinan enzymatic extraction and the decoloration method of mushroom polysaccharides were discussed. By using papain and cellulose enzyme complex processing method, the ratio of the volume, temperature, the optimum pH value and role of time for orthogonal experiment were determined respectively. The optimum technology of enzymatic extraction of lentinan was as follows: the quality proportion of papain and cellulose enzyme was 2, the enzyme reaction temperature was 55℃, pH value was 6.5, the reaction time was 3h. The extraction rate reached 16.1 percent under this condition. The optimum condition of decoloration technology by orthogonal experiment was as follows：quantity of activated carbon was 2.0%, temperature of decoloration was 30℃，pH value was 4.0, the adsorption time was 90min.