NOVELTY - Cultivating needle mushroom, comprises adding water into mushrooms stem particles, soaking, adding bagasse, wooden meal and rice bran into leaching solution, and mixing along with mushroom residue, piling the material, naturally fermenting; turning by adding lime and light calcium carbonate, completing fermentation to obtain culture material; cooling the fermented culture material, placing on a bed, sowing until mycelium grows; and harvesting the second flush mushroom and third flush mushroom, depending on mycelial growth, and spraying mushroom stem leaching solution on the mushroom bed.    USE - The method is useful for cultivating needle mushroom (claimed).    ADVANTAGE - The method: promotes beneficial microorganism breeding, improves the microorganism flora and material and accelerates planting material; produces highly active metabolite product; saves labor and coal resource; and reduces environmental pollution.    DETAILED DESCRIPTION - Cultivating needle mushroom, comprises (i) taking 48-52 wt.% bagasse, 14-18 wt.% wooden meal, 24-28 wt. rice bran, 3-4 wt.% mushroom stem, 3-4 wt.% lime, 1 wt.% light calcium carbonate; where the bagasse is crushed 3-5 mm particle size; the wooden meal is broadleaf wooden meal having particle diameter of 3-5 mm; the mushroom stem is waste produced during mushroom production and processing, which is dried and pulverized into particles of 2-3 mm; (ii) adding 20-30 times of water into mushrooms stem particles, soaking at room temperature for 18-24 hours, adding bagasse, wooden meal, and rice bran into leaching solution, and mixing along with mushroom residue, piling the material to height of 1-1.2 m, width of 2-3 m, controlling the stacked culture material dry weight to 300-500 kg, tapping for four weeks, inserting a wooden stick of 10-15 cm diameter to the heap, maintaining pore density to 1/m3, covering with grass thatch and naturally fermenting; when the material temperature reaches 60 degrees C, insulating for 24 hours, then turning, once a day, first time turning by adding lime, second time turning by adding light calcium carbonate, and turning 3-4 times, for 5-6 days, completing fermentation, to obtain culture material with moisture content of 63-65%, cooling the fermented culture material, placing on a bed, sowing until mycelium grows, when the mycelium covers the material layer, covering with loam of 1-2 cm thick, and conducting fruiting management; and (iii) harvesting the second flush mushroom and third flush mushroom, depending on mycelial growth, spraying 0.01-0.02 g/ml mushroom stem leaching solution 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.