NOVELTY - Preparing soil phosphate-solubilizing fungal inoculant grain spore powder, comprises e.g. (a) taking Eupenicillium euglaucum as female parent, and screening clonal strains of E. euglaucum anamorph JB201015; (b) activating and culturing screened strain, culturing, and eluting spores; (c) inoculating spore suspension into a conical flask containing potato dextrose (PD) culture solution, and culturing to obtain liquid strain; (d) inoculating the liquid strain into cured grain, and culturing and (e) crushing the grain to obtain spore powder, prolonging culture time, and crushing.    USE - The method is useful for preparing soil phosphate-solubilizing fungal inoculant grain spore powder.    ADVANTAGE - The method: does not require deep liquid fermentation process; has less investment, short production period and strong repeatability; and is simple and ensures low carbon environment.    DETAILED DESCRIPTION - Preparing soil phosphate-solubilizing fungal inoculant grain spore powder, comprises (a) taking Eupenicillium euglaucum as female parent, and screening clonal strains of E. euglaucum anamorph JB201015 being beneficial for the growth of plant root secretion product and having strong acid producing capacity from the ascospores; (b) activating and culturing the screened strain, culturing at 22-27 degrees C for 1-2 days, and eluting spores with sterile water (15 ml) to obtain spore suspension; (c) pipetting spore suspension (10 ml), inoculating into a conical flask containing 100 ml potato dextrose (PD) culture solution, culturing at 22-27 degrees C for 3-5 days by oscillating to obtain liquid strain; (d) inoculating the liquid strain into cured grain according to the ratio of liquid strain and cured grain of 5% (m/m: vol), culturing the grain at 25-27 degrees C for 3-5 days, turning once in every 2 days, and culturing for 10-15 days; and (e) directly crushing the grain to obtain spore powder when the amount of spore in each grain is not less than 3 million, specifically prolonging the culture time to 15 days until the amount of spore in each grain is not less than 3 million, and directly crushing the grain when the amount of spore in each grain is less than 3 million to obtain spore powder. An INDEPENDENT CLAIM is also included for the soil phosphate-solubilizing fungal inoculant grain spore powder, prepared by the steps (i) to (iii) as mentioned above, (iv) curing long-grain rice and non-glutinous rice in 2450 MHz microwave to obtain cured rice, or curing maize residue particle with a diameter of 4-5 mm by 2450 MHz microwave for 3 minutes, where the water content of the cured grain is controlled at 18-20%, inoculating the liquid strain into cured grain according to the ratio of liquid strain/cured grain of 5% (m/m: vol), culturing the grain at 25-27 degrees C for 3-5 days, turning once in every 2 days, and totally culturing for 10-15 days; (v) directly crushing the grain to obtain spore powder when the amount of spore in each grain is not less than 3 million, prolonging the culture time for 15 days until the amount of spore in each grain is not less than 3 million, directly crushing the grain to obtain spore powder when the amount of spore in each grain is less than 3 million; and (vi) mixing and culturing not less than 3 million spores containing grains and cured grain according to a ratio of 1:1 for 5-7 days, directly crushing to obtain spore powder when the grain spore amount is not less than 3 million.