NOVELTY - Cultivating Auricularia polytricha comprises: adding clean water into mushroom tang particles and soaking at room temperature, adding the mushroom tang with soaking liquid into bagasse, sawdust and soybean meal for pre-wetting, then piling to ferment, sowing Auricularia polytricha mushroom; harvesting the mushroom, spraying mushroom tang leachate, spraying 5-8 kg/m2 to rejuvenate mycelium, where the mushroom stem leachate is prepared by soaking the mushroom tang in water for 18-24 hours, filtering the residue, making up to its original volume to obtain 0.05 g/ml dilution.    USE - The method is useful for cultivating Auricularia polytricha (claimed).    ADVANTAGE - The method: promotes third and fourth mushroom ear biotransformation rate; saves man-power, coal and other resources; and satisfies low-carbon environmental protection concept.    DETAILED DESCRIPTION - Cultivating Auricularia polytricha comprises: (i) taking 36-44 wt.% sugar cane bagasse, 35-43 wt.% sawdust, 12-14 wt.% soybean meal, 3-4 wt.% mushrooms tangs, 3-4 wt.% lime and 1 wt.% gypsum as dry raw materials, where the sugarcane bagasse is crushed into 3-5 mm particles, the sawdust is 3-5 mm broadleaf tree sawdust, and the mushroom tang is dried and pulverized (2-3 mm) mushrooms production process scraps; (ii) adding 20-30 times clean water into mushroom tangs particles and soaking at room temperature for 18-24 hours, adding the mushroom stem along with soaking liquid into bagasse, sawdust and soybean meal, then piling to a height of 1-1.2 m and a width of 2-3 m, controlling dry weight to 300-500 kg, tapping for 4 weeks, providing vent of 10-15 cm using a stick with a pore density of 1/m3, allowing it to ferment naturally; (iii) turning once when the temperature reaches 60 degrees C until 24 hours, turning once a day, adding lime and gypsum, turning, then adding limestone and gypsum, totally turning for 3-4 times in 5-6 days, stopping the fermentation, adjusting the moisture content to 63-65%; (iv) cooling the fermented cultivation material, seeding the Auricularia polytricha spawn, cultivating, covering soil particles (0.5-1 cm) into 1-1.5 cm thickness, then carrying out routine fruiting body management when the mycelium covers the material layer; and (v) harvesting the mushroom, spraying 0.01-0.02 g/ml mushroom tang leachate, spraying 4-6 kg to rejuvenate mycelium, where the mushroom tang leachate is prepared by soaking the mushroom tang particles in 20 times amount of water for 18-24 hours, filtering the residue, making up to its original volume with water to obtain 0.05 g/ml dilution.