The present invention provides a method for extracting Tremella polysaccharides by using buffer solution, which comprises the following steps: leaching Tremella powder in a buffer solution with heating to obtain the leachate; subjecting the said leachate to solid-liquid separation and obtaining the liquid component which contains Tremella polysaccharides; subjecting the said liquid component to alcohol precipitation, and the precipitate obtained is Tremella polysaccharides. According to the method of the invention, various buffer solutions can achieve the extraction rates of Tremella polysaccharides up to 33:12%, which is 3 to 4 times of that of the traditional water extraction method, and greatly improve the extraction yields of Tremella polysaccharides.