The extraction of polysaccharides from Salicornia bigelovii Torr.was studied in this paper.According to the single-factor experiments,three levels of the factors( extraction temperature,time and the ratio of water to solid) were selected for the Box-Behnken factorial design to establish a quadric regression equation for describing the yield of polysaccharides. By response surface analysis,the optimum extraction conditions were obtained as follows: extraction temperature of 90℃,extraction time of 4.0h and wa...