Abstract: Some physical and chemical properties of polysaccharides of Agaricus blazei were investigated in this paper. The results showed that three groups of purified polysaccharide were free from urinic acid. The protein content of the polysaccharides was AB-I 20.1%, AB-II-b 16.3% and AB-III-b 25.6%. The specific rotatory power of the polysaccharides was AB-I +44.33°, AB-II-b +3.70°, AB-III-b +5.04°. The viscosity of AB-I and AB-II-b was increased with the increase of solution concentration . The viscosity of 1% AB-I and AB-II-b was stable in different concentration of NaCl, pH value and temperature.

Key words: Agaricus blazei , Polysaccharide , Physical and chemical properties