NOVELTY - Preparing microbial organic fertilizer, involves inoculating Aspergillus aculeatus (CGMCC 6799) into potato dextrose agar (PDA) solid plate medium, culturing and counting spores, diluting the spore liquid, mixing the spore solid culture and nutrient solution, inoculating Penicillium crustosum (CGMCC 6800) strain in PDA solid plate medium, culturing and diluting the spore liquid, mixing the spore solid culture and nutrient solution, mixing spore liquids, adding mixture in stacked pile, fermenting and obtaining finished product.    USE - The method is useful for preparing microbial organic fertilizer which is useful for controlling pepper Phytophthora blight and pepper anthracnose (claimed).    ADVANTAGE - The fertilizer has more than 45% organic matter, more than 0.7% nitrogen content, more than 1.8% phosphorus pentoxide, more than 4.5% potassium oxide content, more than 7.4% total nutrient content and more than 30% moisture content. The fertilizer improves germination index to 80% or more. Tests prove that the plant height of a tested group using the fertilizer product can be increased by 12-25% in comparison with a control group which does not use the fertilizer in pepper pot incubation tests, and the pepper Phytophthora blight control efficiency is up to 30% or more.    DETAILED DESCRIPTION - Method for preparing microbial organic fertilizer, involves (a) obtaining Aspergillus aculeatus (CGMCC 6799) and Penicillium crustosum (CGMCC 6800)? inoculating A.aculeatus (CGMCC 6799) into potato dextrose agar (PDA) solid plate medium, culturing at 25 degrees C for 5 days, eluting spores using sterile water, counting spores using a hemocytometer, diluting the spore liquid to 1x 104 colony forming units (cfu)/ml, obtaining 1.5% spore inoculum in solid medium, culturing under darkness for 5 days, where the cell count reaches 5.6x 108 cfu/g, obtaining A.aculeatus spore solid culture, mixing the spore solid culture and nutrient solution in a ratio of 10:7, where the nutrient solution comprises 15 g dipotassium hydrogenphosphate, 5 g magnesium sulfate and 1 l water, (b) inoculating P.crustosum (CGMCC 6800) strain in PDA solid plate medium, culturing at 25 degrees C for 5 days, eluting spores using sterile water, counting spores using a hemocytometer, diluting the spore liquid to 1x 104 cfu/ml, obtaining 0.5% spore inoculum in solid medium, culturing under natural light for 5 days, where the cell count reaches 7.5x 109 cfu/g, obtaining P.crustosum spore solid culture, mixing the spore solid culture and nutrient solution which is obtained by mixing 85 g bran, 15 g husk, 0.45 g potassium dihydrogen phosphate (KH2PO3), 0.225 g magnesium sulfate heptahydrate and 90 ml water, and sterilizing at 121 degrees C for 20 minutes, and (c) mixing the A.aculeatus spore mixture and P.crustosum spore mixture in the ratio of 1:1, (d) adding auxiliary agent to the spore mixture in the ratio of 2.3-3.5:1, adding the obtained mixture in stacked triangular pile with moisture content of 55-65%, where the pile comprises chicken manure, saw dust, husk or other crop stalks, turning the pile once a week, measuring body temperature of the stack, fermenting for 18-28 days, when the temperature of the pile is reduced to 40 degrees C, adding 0.5% inoculum of organic manure bacteria, performing secondary fermentation for 7-15 days, where the A.aculeatus spore mixture and P.crustosum spore count reaches 1x 106 cfu/g or more, and obtaining finished product.