The invention discloses a method for extracting Anoectochilus roxburghii polysaccharides. The method comprises the steps: (1) cleanly washing Anoectochilus roxburghii herbs, then, baking the Anoectochilus roxburghii herbs at the temperature of 40-60 DEG C, then, crushing and sieving the baked Anoectochilus roxburghii herbs, soaking the sieved Anoectochilus roxburghii herbs with 80-95% ethanol according to the ratio (v: w) of (8-12): 1 for 10-15 hours, carrying out filtration, carrying out repeated treatment for 2-3 times, concentrating the filtrate for later use, and baking filtration residue so as to obtain pretreated powder; and (2) weighing the pretreated powder, adding distilled water into the weighed pretreated powder according to the liquid/material ratio of 1: (25-35), carrying out water bath for 60-90 minutes at the temperature of 60-70 DEG C, carrying out suction filtration, carrying out repeated extraction for 3-5 times, and merging the filtrates, thereby obtaining a polysaccharide extract. Under the condition of the extraction process disclosed by the invention, the extraction yield of the Anoectochilus roxburghii polysaccharides is 26.68%. By applying the process disclosed by the invention, the polysaccharides are high in yield and simple and easy in regulation and control and have production and application values.