NOVELTY - A cultivation base material comprises 50-60 pts .wt. bagasse, 10-15 pts. wt. Saccharum arundinaceum powder, 20-30 pts. wt. watermelon vine particles, 10-13 pts. wt. Eucalyptus wood powder, 15-18 pts. wt. tea, 15-16 pts. wt. potato slag, 2-3 pts. wt. peanut skin, 5-8 pts. wt. shrimp shell powder,2-3 pts. wt. calcined lime, 1-2 pts. wt. gypsum powder, 4-6 pts. wt. plant ash, and 5-10 pts. wt. sustained-release granules. The sustained-release granules include 4-6 pts. wt. American ginseng, and 10-12 pts. wt. attapulgite.    USE - A cultivation base material used for Agaricus blazei (claimed).    ADVANTAGE - The cultivation base material has wide material source, is inexpensive, and achieves high Agaricus blazei biological conversion rate and high yield.    DETAILED DESCRIPTION - A cultivation base material comprises 50-60 pts .wt. bagasse, 10-15 pts. wt. S. arundinaceum powder, 20-30 pts. wt. watermelon vine particles, 10-13 pts. wt. Eucalyptus wood powder, 15-18 pts. wt. tea, 15-16 pts. wt. potato slag, 2-3 pts. wt. peanut skin, 5-8 pts. wt. shrimp shell powder,2-3 pts. wt. calcined lime, 1-2 pts. wt. gypsum powder, 4-6 pts. wt. plant ash, and 5-10 pts. wt. sustained-release granules. The sustained-release granules comprise 4-6 pts. wt. American ginseng, 4-6 pts. wt. radix pseudostellariae, 3-4 pts. wt. Nicotiana tabacum, 3-4 pts. wt. spearmint, 4-6 pts. wt. licorice, 5-6 pts. wt. Gynostemma pentaphyllum, 3-4 pts. wt. rehmanniae, 4-5 pts. wt. Forsythia, 3-4 pts. wt. radix astragali, 5-6 pts. wt. hyacinth bean, 6-8 pts. wt. honey, 0.2-0.3 pts. wt. ammonium sulfate, 0.5-1 pts. wt. magnesium sulfate, 0.1-0.3 pts. wt. copper sulfate, and 10-12 pts. wt. attapulgite. An INDEPENDENT CLAIM is included for preparing the cultivation base material, comprising adding water to bagasse, S. arundinaceum powder, watermelon vine particles, Eucalyptus wood powder, tea, potato slag, peanut skin, shrimp shell powder, calcined lime, gypsum powder, plant ash, and sustained-release granules, and adjusting water content at 65-71%; uniformly stacking, fermenting for 6-8 days, adding water, uniformly mixing, adjusting water content at 65-70%, placing in a mushroom bag, and tying ends; and carrying out atmospheric heat sterilization at 100 degrees C for 4-6 hours, stopping heating, and naturally cooling to 29 degrees C.