NOVELTY - Method for cultivating oyster mushroom, involves preparing culture medium using corn straw, biogas residue powder, biogas slurry, sawdust, gypsum powder, urea, calcium superphosphate, corn flour, carbendazim and lime powder, bagging culture medium, sterilizing the culture medium at 100-120 degrees C for 4-8 hours, cooling the culture medium, inoculating oyster mushroom into the culture medium, carrying out culturing process at room temperature, transferring the oyster mushroom to mushroom house when bag is full of mycelium and primordium, and carrying out fruiting management.    USE - The method is useful for cultivating oyster mushroom (claimed).    ADVANTAGE - The method cost-effectively improves growth, yield and quality of oyster mushroom, and increases income of farmer.    DETAILED DESCRIPTION - Method for cultivating oyster mushroom, involves (a) obtaining 45-51 %mass corn straw, 18-22 %mass biogas residue powder, 10-30 %mass biogas slurry, 1.5-4.5 %mass sawdust, 0.4-1.2 %mass gypsum powder, 0-1.5 %mass urea, 0-0.8 %mass calcium superphosphate, 2-6 %mass corn flour, 0-0.8 %mass carbendazim and 0.2-0.5 %mass lime powder, (b) crushing the corn straw to a length of 2-4 cm and width of less than 1 cm, mixing lime powder and water in a mass ratio of 0.5-1:95-100 to obtain lime solution, immersing crushed corn straw in lime solution for 24-36 hours, drying immersed corn straw until water content of dried corn straw reaches 12-20%, adding biogas residue powder, biogas slurry, sawdust, gypsum powder, urea, calcium superphosphate, corn flour and carbendazim, mixing obtained mixture with water in a ratio of 1-1.5:1 to obtain slurry, and stacking obtained mixture for 36-48 hours to obtain culture medium, (c) controlling pH and water content of the culture medium at 7.5-8.5 and 53-56%, respectively, bagging the culture medium by existing method, sterilizing the culture medium at 100-120 degrees C for 4-8 hours, cooling the culture medium, inoculating 1-2% oyster mushroom into the culture medium, and carrying out culturing process at room temperature, and (d) transferring the oyster mushroom to mushroom house when bag is full of mycelium and primordium of oyster mushroom, and carrying out fruiting management by existing method.