NOVELTY - Cultivating white mushroom comprises: (i) preparing the culture medium by mixing e.g. crop straw, sawdust and with water; (ii) stewing the culture medium, pouring into a polyethylene plastic bag, then covering with another polyethylene plastic bag and tying bag mouth with a wire; (iii) arranging the bags in stacking manner and sterilizing; (iv) cooling the bags; (v) inoculating the strain under aseptic condition; (vi) cultivating the mushroom under stationary dark condition; (vii) transferring the culture bags into a greenhouse; (viii) removing the outer bag; and (ix) harvesting the mushroom.    USE - The method is useful for cultivating white mushroom (claimed).    ADVANTAGE - The method utilizes natural raw materials and thus does not cause chemical damage or environmental pollution, provides nutrition-enriched mushrooms ensuring good health of people, and has enhanced fruiting rate.    DETAILED DESCRIPTION - Cultivating white mushroom comprises: (i) uniformly mixing 50-75 wt.% crop straw, 15-30 wt.% sawdust, 5-15 wt.% wheat bran, 2-5 wt.% corn flour, 1-5 wt.% animal manure, 1 wt.% gypsum and 1 wt.% lime, then mixing the mixed material with water in a ratio of 1:1.3-1.5 until moisture content reaches 62-68% to obtain culture medium; (ii) stewing the culture medium for 5-6 hours, then pouring into a polyethylene plastic bag (inner layer of 15x 28x 0.05 cm) by double-set method up to 16-18 cm height, where the upper end of the bag is diagonally folded down, then covering from top to down with another polyethylene plastic bag (specification of 17x 30x 0.05 cm), turning upside down and tying bag mouth with a wire; (iii) arranging the packed bags in stacking manner and sterilizing at 100 degrees C for 10-12 hours under normal pressure; (iv) cooling the sterilized bags to 20-30 degrees C; (v) placing the bags in a sterilized inoculation box, then inoculating the strain under aseptic condition by avoiding bacterial infection; (vi) cultivating the mushroom under stationary dark condition at 14-16 degrees C by maintaining proper ventilation; (vii) transferring the culture bags into a greenhouse when the mycelium grows and covers completely, maintaining greenhouse temperature to 12-18 degrees C, spraying water on the floor and walls to increase air relative humidity to 85-90%, maintaining pH to 5.5-6.5, providing daylight stimulation, and opening window during night for cold stimulation; (viii) removing the outer bag after 5-7 days of mushroom growth (soy-bean sized), removing the cover mouth to promote pileus differentiation; (ix) harvesting the mushroom when the fruiting body expands but not bends in a timely manner; and (x) repeating the above procedure for second harvest.