NOVELTY - Culture medium comprises (in pts.wt.): cotton seed hull (80-85), wooden meal (30-35), wheat bran (18-20), vegetable seed (13-15), mango core (8-10), bone powder (7-8), sweet potato leaves powder (10-11), Spirulina (4-6), flue ash (5-7), gypsum powder (1-2), calcium carbonate (0.4- 6), sucrose (1-2), magnesium sulfate (0.2-0.3), Chinese magnolia vine fruit (1-2), agilawood (2-3), raspberry (1.5-2.5), Gardenia (2.5-3), tuckahoe (1-1.5), sweet potato starch (25-30), sodium (0.5-0.6) and nutritional additive (10-11).    USE - Culture medium used for Hericium erinaceus (claimed).    ADVANTAGE - The culture medium is prepared in a cost-effective and eco-friendly manner.    DETAILED DESCRIPTION - Culture medium comprises (in pts.wt.): cotton seed hull (80-85), wooden meal (30-35), wheat bran (18-20), vegetable seed (13-15), mango core (8-10), bone powder (7-8), sweet potato leaves powder (10-11), Spirulina (4-6), flue ash (5-7), gypsum powder (1-2), calcium carbonate (0.4- 6), sucrose (1-2), magnesium sulfate (0.2-0.3), Chinese magnolia vine fruit (1-2), agilawood (2-3), raspberry (1.5-2.5), Gardenia (2.5-3), tuckahoe (1-1.5), sweet potato starch (25-30), sodium propionate (0.5-0.6) and nutritional additive (10-11). The medium is prepared by mixing uniformly all components in soy milk and yeast is added to carry out fermentation at 30-35 degrees C for 3-4 hours. The fermentation product is granulated and dried to obtain the finished product.    The nutritional additive comprises 20-22 pts. wt. soy sauce, 8-10 pts. wt. iron ore tailing sand, 0.2-0.3 pts. wt. fingered citron    oil, 5-6 pts. wt. oil shale powder, 2-3 pts. wt. wood vinegar, 13-15 pts. wt. soybean and 0.2-0.3 pts. wt. yeast.    An INDEPENDENT CLAIM is included for a method for preparing culture medium, which involves:    (A) crushing all components and extracting herbal components 4-5 times of in water by using slow fire for 30-35 minutes; and    (B) mixing rest components and stirring uniformly, sterilizing at 20 degrees C for 121 minutes and then packaging in a polyethylene plastic bag to obtain final product.