NOVELTY - Cultivating Auricularia polytricha comprises taking 46-54% cotton seed hull, 28-36% wooden meal, 10-12% bean cake, 3-4% mushroom stalk, 2-3% lime and 1% gypsum, adding 20-30 times of water into mushroom stalk, soaking at room temperature for 18-24 hours, adding cotton seed hull, wooden meal and bean cake, mixing, piling the material and fermenting, controlling the material temperature at 60 degrees C for 24 hours, turning, terminating fermentation, cooling the fermented culture material, forming furrow bed, and harvesting.    USE - The method is useful for cultivating Auricularia polytricha (claimed).    ADVANTAGE - The method accelerates catalytic decomposition of culture material, improves microflora feed, which promotes beneficial microorganism breeding; has fermented material which has active metabolites for mycelium biological activity, which promotes growth rate with strong anti bacterial ability; saves labor intensity and coal resources; and is environmentally friendly.    DETAILED DESCRIPTION - Cultivating Auricularia polytricha comprises (i) taking 46-54% cotton seed hull, 28-36% wooden meal, 10-12% bean cake, 3-4% mushroom stalk, 2-3% lime and 1% gypsum, where the wooden meal is broadleaf wooden meal of particle diameter 3-5 mm and the mushroom stalk is the waste obtained in mushroom production process, which is dried and smashed into 2-3 mm granule, (ii) adding 20-30 times of water into mushroom stalk, soaking at room temperature for 18-24 hours, adding cotton seed hull, wooden meal and bean cake, mixing, piling the material to height of 1-1.2 m and width of 2-3 m to form trapezoidal stack, controlling dry weight of culture material in each stack to 300-500 kg, tapping for four weeks, inserting 10-15 cm diameter stick into the bottom of stack and forming vertical vent, controlling stomatal density of 1/m3, covering with a grass thatch and fermenting, (iii) controlling the material temperature at 60 degrees C for 24 hours, turning once in a day, adding lime in first turning, adding gypsum in second turning, total turning for 3-4 times and lasting for 5-6 days, terminating fermentation, and controlling moisture content to 63-65%, (iv) cooling the fermented culture material, forming furrow bed, sowing mycelium grown on culture medium onto the bed, when the mycelium covers the material layer, covering soil particles with diameter of 0.5-1 cm and the thickness of loam is 1-2 cm, and (v) harvesting the second flush mushroom and third flush mushroom, depending on mycelial growth, spraying 3-5 kg/m2 mushroom stem leaching solution (0.01-0.02 g/ml) on the mushroom bed, where the mushroom stem leaching solution is prepared by adding 20 times water into mushroom stem particles, soaking at room temperature for 18-24 hours, filtering the residue, making up the volume with water to obtain 0.05 g/ml mushroom stem leaching solution, and diluting with water.