NOVELTY - Cultivating tea tree mushroom, comprises (i) preparing a base material by choosing cotton shells or rapeseed shell, biogas residues, phosphate fertilizer, gypsum, calcium sulfate and calcium carbonate; (ii) pre-wetting cotton shells or rapeseed shell; (iii) uniformly mixing pre-wet biogas residues, phosphate fertilizer, gypsum, calcium sulfate and calcium carbonate; (iv) adding base material into a normal undamaged jar; (v) heating; (vi) cutting mushroom ring; (vii) carrying out fungal culture; and (viii) carrying out indoor cultivation by taking out mycelium covering jar as a base material.    USE - The method is useful for cultivating tea tree mushroom (claimed).    ADVANTAGE - The method not only guarantees by providing nutrients required while cultivating mushroom, but also utilizes waste of biogas residues, and thus it is environmental friendly.    DETAILED DESCRIPTION - Cultivating tea tree mushroom, comprises (i) preparing a base material by choosing 75% cotton shells or rapeseed shell, 20% biogas residues, 1% phosphate fertilizer, 1.5% gypsum, 1.5% calcium sulfate and 1% calcium carbonate; (ii) pre-wetting cotton shells or rapeseed shell until the moisture content is 70-75%; (iii) uniformly mixing pre-wet biogas residues, phosphate fertilizer, gypsum, calcium sulfate and calcium carbonate; (iv) adding the base material into a normal undamaged jar, where the loading capacity is 3/4th the height of the jar, and completely filling the base material so as to utilize as masks or sealing the jar with a gauze, covering with a kraft paper, and fastening linearly; (v) directly adding boiling water into jar fitted with a pot, heating while cooking for 6 hours, heating, and naturally cooling; (vi) taking out the kraft paper from the port of the jar, once the temperature is reduced to 0-26 degrees C, and replacing the masks or gauze with a mushroom ring, cutting the mushroom ring to produce a yarn cloth by using a rib or a waste bicycle inner tire, and inoculating under open condition; (vii) carrying out fungal culture under traditional method, and allowing continuous growth of hyphae covering the entire bag after 28-30 days, and carrying out indoor cultivation; and (viii) carrying out indoor cultivation by taking out mycelium covering the jar as a base material, and placing whole block of mushroom into a mushroom bed frame of a mushroom house, and adding fine soil onto fungal mass to a level of 4-5 cm, and covering the over grown layer with a plastic film to retain moisture content, and allowing the mushroom to germinate once the over grown layer is obtained at a level of 0.5-0.8 cm after 12-15 days, and allowing the surface for farming, ventilating, drying the surface, spraying water onto mushrooms after 2 days, and allowing the mushrooms to grow.