NOVELTY - Culture medium comprises straw, cow dung, cottonseed hull, gypsum powder, calcium superphosphate, urea, sugarcane, potassium humate, rice flour, plant ash, pumpkin leaves powder, whey powder, garlic, castor cake, rhizoma cibotii, Millettia root, Polygala tenuifolia, ginseng, alginate fibers, and nutritional additives.    USE - The medium is useful for culturing Agaricus blazei (claimed).    ADVANTAGE - The culture medium can be prepared in an environmentally-friendly manner.    DETAILED DESCRIPTION - Culture medium comprises 140-150 pts. wt. straw, 30-35 pts. wt. cow dung, 25-30 pts. wt. cottonseed hull, 2-3 pts. wt. gypsum powder, 1-1.2 pts. wt. calcium superphosphate, 1-2 pts. wt. urea, 2-3 pts. wt. sugarcane, 0.6-0.7 pt. wt. potassium humate, 10-12 pts. wt. rice flour, 11-13 pts. wt. plant ash, 14-15 pts. wt. pumpkin leaves powder, 10-11 pts. wt. whey powder, 0.5-0.6 pt. wt. garlic, 15-17 pts. wt. castor cake, 6-7 pts. wt. rhizoma cibotii, 3-4 pts. wt. Millettia root, 4-5 pts. wt. Polygala tenuifolia, 2-3 pts. wt. ginseng, 2-3 pts. wt. alginate fibers, and 10-11 pts. wt. nutritional additives. The nutritional additive comprises 13-14 pts. wt. rice water, 5-6 pts. wt. fish viscera, 4-5 pts. wt. fish scales, 1-2 pts. wt. almond oil, 8-9 pts. wt. apple residues, 22-25 pts. wt. flour, 7-8 pts. wt. fly ash, and 8-9 pts. wt. bentonite. The nutritional additive is prepared by (a) drying fish viscera and fish scales into powder, mixing obtained powder with rice water, and performing natural fermentation for 7-8 days, (b) mixing remaining raw materials and adding water, and stirring mixture, and (c) adding fermented product obtained in the step (a) to mixture obtained in the step (b), and drying obtained product. An INDEPENDENT CLAIM is included for method for preparing the culture medium, which involves (a) drying cow dung and adding effective microorganism, and performing fermentation for 20-24 days, (b) adding 8-10 times water to calcium superphosphate, urea, sucrose, and potassium humate, and stirring mixture, (c) cutting straw into pieces and puffing straw pieces, (d) adding castor cake, rhizoma cibotii, Millettia root, P.tenuifolia, and ginseng to products obtained in the steps (a)-(c), and adding remaining raw materials to mixture, and adding water, and (e) sterilizing obtained mixture at 100 degrees C.