NOVELTY - A straw mushroom stock seed culture material comprises: 40-50% corn, 30-40% rice, 10% bagasse, 8% cotton seed hull, 1% gypsum powder and 1% lime powder. The bagasse is prepared by extracting sugar cane sugar after the rest, crushing into particles with particle diameter.    USE - As straw mushroom stock seed culture material (claimed).    ADVANTAGE - The culture material provides paddy and grain of corn grain which is not easy to break, and the gap of the corn. The culturing material does not plate the caking phenomenon, thus has high rate of finished products, good quality, then transferred to the planting of corn grain, supplying rice grain as hypha growth nutrient source, mycelium growth vigor excess, and strong vitality, has strong in water preserving property, improves the water of the culturing material, avoids the particle strain aging hardening, and prolongs strain storage life.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of straw mushroom stock seed culture material involving: corn soaking, steaming by taking corn grain for 1% lime water to soak them for 15-20 hours, then washing with clean water and putting them into a pot for storing a white line center to endosperm, then taking out water dropping, rice, and cleaning rice, imitative rice germination, at room temperature of 25 degrees C, dipping for 20 hours 1% lime water solution, it can basically maize water, that is a natural white, and then the rice is a white hot for several minutes in the boiling water pot to kill rice sprout, the maize grain so as to lose the germination of water, then taking out water dropping, auxiliary material pre-wetting the bagasse and cotton seed hull dry materials, using lime water solution with the concentration of 1%, pouring in the mixed material, stirring uniformly, pre-wet 2 hours, rice till the water content is kept at 58-60%, mixing the boiling by the hot corn and rice (white) and other accessories (wet material, gypsum powder, fully stirring uniformly, bottling the cultivating material to mix evenly in 1100x 78 ml polypropylene plastic bottle cover with ventilating sponge bottle cap. The sterilizing, and cooling of the culture material is carried out under high pressure, firstly sterilizing for hours, then heating to 121 degrees C for 2 hours at 100 degrees C, naturally cooling to below 25 degrees C after sterilizing.