Earthing matrix for improving yield of coprinus comatus and preparation method thereof

The invention discloses an earthing matrix for improving the yield of coprinus comatus and a preparation method thereof. The earthing matrix for improving the yield of coprinus comatus is prepared from raw materials of field soil and humus by steps of pretreatment, tempering and posttreatment, wherein the weight ratio of the field soil to the humus is (1 to 3) to (7 to 9). The preparation method comprises the steps: taking the field soil to the humus as raw materials, and performing pretreatment, tempering and posttreatment. The earthing matrix for improving the yield of coprinus comatus is rich in nutrition, loose in structure and good in air permeability; by adding a great deal of humus into the field soil, the composite earthing matrix is obtained, the water-holding capacity and the porosity of soil can be effectively improved, and the structure of the soil is improved, and thus the yield of coprinus comatus is improved. The coprinus comatus cultivated by using the earthing matrix prepared according to the