[Objective] The purpose was to study the optimum culture condition for culturing Tremella aurantialba mycelia by liquid-submerged fermentation and the extraction technology of its polysaccharide.[Method] The optimum culture condition for culturing T.aurantialba mycelia by liquid-submerged fermentation was ascertained through screening media and optimizing culture condition and the extraction effects of alkali extraction method and hot water soaking method on T.aurantialba polysaccharide were studied through...