NOVELTY - Culture medium comprises 20-30 pts. wt. straw stick, 25-29 pts. wt. cottonseed hull, 5-8 pts. wt. Amorpha fruticosa leaves, 4-8 pts. wt. bean cake, 18-25 pts. wt. sweet elephant grass, 15-25 pts. wt. corn core granules, 10-16 pts. wt. dairy manure, 3-6 pts. wt. mollusk shell powder, 0.4-8 pts. wt. calcium superphosphate, 0.15-0.35 pts. wt. potassium dihydrogen phosphate, 1-4 pts. wt. quicklime, 0.1-0.25 pts. wt. cellulose enzyme and 5-10 pts. wt. nutritional additive. Nutritional additive comprises 300-310 pts. wt. kaolin and 10-14 pts. wt. jade powder.    USE - Culture medium used for cultivating straw mushroom (claimed).    ADVANTAGE - The culture medium is prepared in a cost-effective and eco-friendly manner and enriched in nutrition that is easy to absorb, and has high biological conversion rate.    DETAILED DESCRIPTION - Culture medium comprises 20-30 pts. wt. straw stick, 25-29 pts. wt. cottonseed hull, 5-8 pts. wt. Amorpha fruticosa leaves, 4-8 pts. wt. bean cake, 18-25 pts. wt. sweet elephant grass, 15-25 pts. wt. corn core granules, 10-16 pts. wt. dairy manure, 3-6 pts. wt. mollusk shell powder, 0.4-8 pts. wt. calcium superphosphate, 0.15-0.35 pts. wt. potassium dihydrogen phosphate, 1-4 pts. wt. quicklime, 0.1-0.25 pts. wt. cellulose enzyme and 5-10 pts. wt. nutritional additive. Nutritional additive comprises 300-310 pts. wt. kaolin, 10-14 pts. wt. jade powder, 0.1-0.2 pts. wt. carbon nanopowder, 20-24 pts. wt. excrementum bombycis, 1-2 pts. wt. rhizoma ligustici wallichii powder, 1-2 pts. wt. Coix seed oil, 1-2 pts. wt. iron residue powder, 1-2 pts. wt. tea polyphenol, 4-5 pts. wt. kelp, 4-5 pts. wt. actinolite powder, 20-24 pts. wt. seaweed meal, 5-7 pts. wt. grape, 1-2 pts. wt. Chinese chestnut leaf, 3-4 pts. wt. malic acid, 10-12 pts. wt. flour. Nutritional additive is prepared by mixing components, crushing and then stirring uniformly. An INDEPENDENT CLAIM is included for a method for preparing culture medium, which involves:    (A) mixing straw pole, cotton seed hull, Amorpha fruticosa leaves and sweet elephant grass, drying it, crushing to obtain mixed powder;    (B) adding water uniformly (3-4 times) with powder mixture, and boiling at 75-85 degrees C for 28-32 hours and adding cellulase to carry put enzymolysis, and then cooling to 33-42 degrees C to obtain enzymolysis granule;    (C) fermenting the enzymolysis liquid and remaining components by using water in a ventilated container for 8-13 days to obtain a fermented product; and    (D) sterilizing the fermented product at 100-120 degrees C for 8-10 hours, cooling at 28 degrees C, and then packaging in a bag to obtain final product.