NOVELTY - An artificial grass soil carbon comprises 55-65 pts. wt. dairy manure, 15-25 pts. wt. crop straw, 5-15 pts. wt. edible culture medium, and 5-15 pts. wt. rice bran. The crop straw can be corn, rice, sorghum, millet, or bean straw. The waste edible culture medium is artificial cultured edible mushroom with the waste culture medium, edible tree fungus, mushroom, or mushroom waste culture medium. The rice bran can be rice, corn, millet, or rice sugar.    USE - Artificial grass soil carbon.    ADVANTAGE - The artificial grass soil carbon is environment-friendly, and has simple and easy preparation method, short fermentation time and low cost.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of artificial grass soil carbon comprising:    (A) crushing the dairy manure, crop straw, and waste edible medium into crushing screen;    (B) stirring the crushed dairy manure, crop straw and waste edible medium;    (C) fermenting by (a) fully stirring the raw material formulation into a high pass heap, natural fermenting, turning once every two months, turning twice to three times in a row, at 10-25 degrees C for 110-130 days, decomposing, completing piling on top of long grass illustrate fermentation to obtain fermented soil carbon artificial grass having gray and black colors, and which has odorless sour taste; or (b) fully stirring the raw material to a weight ratio of 1000:1, and then adding fast rotting agent, fully stirring, passing into the height of 2 m, width of 4 m and the length of 20-30 m stack; inner of stack interval 3 m is a vent-pipe, a height of 2 m whose diameter is 20 cm, and the tube wall is porous, and a stack of outside cover with plastic cloth to make a rapid fermentation warming, turning once every 5-7 days; in article heap fermentation temperature reaches 30-35 degrees C, cover strip heap outside sheeting can be removed; at 10-25 degrees C ambient temperature, the fermentation time is 10-30 days, where the color of the fermented artificial grass soil carbon is gray and black, and having odorless sour taste, and the fermentation is finished; and    (D) crushing the fermented artificial grass soil carbon solid material and sieving to a particle size of 40-80 mesh, and then weighing measurement, packaging to obtain finished artificial grass soil carbon.