TECHNOLOGY FOCUS - AGRICULTURE - Preferred Components: The livestock manure is mixture of cow dung, chicken manure and pig manure, where the water content of cow dung is 5-10%, chicken manure is 4-8%, pig manure is 6-12%, the weight ratio of dairy manure, chicken manure and pig manure is 3:1:4. The fungal bran is Agaricus bisporus mushroom bran, the weight of Agaricus bisporus bran is 4.96 pts. wt.. The fertilizer comprises 1.15 pts. wt. radix sophorae flavescentis residue with fineness of 20 meshes.    TECHNOLOGY FOCUS - BIOLOGY - Preferred Method: The complex microbial agent is obtained by inoculating Bacillus subtilis, Bacillus megaterium and yeast in liquid culture medium and activating, and drying to obtain microbial inoculum. The specific preparation of complex microbial agent comprises (i) preparing single microbial agent: preparing Bacillus subtilis microbial inoculum: inoculating Bacillus subtilis strain in a sterilized fermentation tank containing fermenting culture medium, where the culture medium comprises 0.2-0.8% starch, 0.01-0.06% yeast extract, 0.2-0.8% soybean meal, 0.1-0.4% urea, 0.2-0.8% dipotassium hydrogen phosphate, 0.1-0.5% potassium dihydrogen phosphate, 0.05-0.15% magnesium sulfate, and 0.006-0.012% manganese sulfate, pH is 6.8-7.2, the fermentation condition is: ventilation ratio is 0.9-1.1:0.5, culture temperature is 35-40 degrees C, stir speed is 100-200 revolutions/minute, dissolved oxygen is not less than 30%, the pH value is not less than 6.5, stirring for 6-8 hours and culturing, so that viable cell content is 1010 plaque-forming unit (pfu)/ml, obtaining fermentation liquid, adding disodium hydrogen phosphate and calcium chloride, flocculating, using plate frame filter pressing method to obtain bacterial sludge, blast drying bacterial sludge at 45-50 degrees C until the water content is 25-35%, cyclone separating powder, placing in a crusher to crush, sieving with 30-mesh sieve to obtain powder; preparing Bacillus megaterium bacteria solution: using the culture method which is liquid deep fermentation, inoculating the nitrogen fixation Bacillus strain into the sterilized triangular flask containing fermentation culture medium, where the medium comprises 0.2-0.8% starch, 0.2-0.8% glucose, 0.01-0.06% yeast extract, 0.005-0.015% manganese sulfate, and 0.005-0.015% vitamin B12, where the pH is 6.8-7.2, the fermentation condition is: the culture temperature is 32-38 degrees C, the stir speed is 100-200 revolutions/minute, pH value is 7-7.4, stirring and culturing for 8-12 hours, so that the viable cell content is 1010 pfu/ml, obtaining fermentation liquid, adding disodium hydrogen phosphate and calcium chloride, flocculating, using plate frame filter pressing method to obtain bacterial sludge, blast drying bacterial sludge at 45-50 degrees C until the water content is 25-35%, cyclone separating to powder, placing the powder in a crusher to crush, sieving with 30-mesh sieve to obtain powder; preparing yeast inoculum: inoculating the yeast strain into the sterilized fermentation tank containing fermentation culture medium, where the fermentation culture medium comprises 20% potato starch, 1-3% glucose, and 0.5-2% corn steep liquor, pH is 6.8-7.2, the fermentation condition is: ventilation ratio is 0.9-1.1:0.5, culture temperature is 28-30 degrees C, stir speed 100-200 revolutions/minute, the dissolved oxygen not less than 30%, the pH value is not less than 6.5, stirring and culturing for 3 days so that the viable cell content is 108 pfu/ml, obtaining fermentation liquid, adding disodium hydrogen phosphate and calcium chloride, flocculating, using plate frame filter pressing method to obtain bacterial sludge, blast drying bacterial sludge at 45-50 degrees C until the water content is 25-35%, cyclone separating to obtain powder, placing the powder in a crusher to crush, sieving with 30-mesh sieve to obtain a powder, and (ii) preparing composite microbial agent: mixing single microbial inoculum of Bacillus subtilis, Bacillus megaterium and yeast according to the mass ratio of 6:3:1 to obtain the complex microbial inoculum. The preparation of Bacillus subtilis microbial agent comprises inoculating Bacillus subtilis strain in a sterilized fermentation tank containing fermenting culture medium, where the culture medium comprises 0.6% starch, 0.04% yeast extract, 0.5% soybean meal, 0.3% urea, 0.5% dipotassium hydrogen phosphate, 0.3% potassium dihydrogen phosphate, 0.1% magnesium sulfate, 0.01% manganese sulfate, where the pH is 7, the fermentation condition is: ventilation ratio is 2:1, culture temperature is 37 degrees C, stirring speed is 150 revolutions/minute, the dissolved oxygen is not less than 30%, the pH value not less than 6.5, stirring and culturing for 7 hours so that the viable cell count is 1010 pfu/ml, obtaining fermentation liquid, adding disodium hydrogen phosphate and calcium chloride, flocculating, using the plate frame filter pressing method to obtain bacterial sludge, blast drying at 48 degrees C until the water content is 25-35%, cyclone separating to obtain powder, placing in a crusher to crush, sieving with 30-mesh sieve to obtain powder. The preparation of Bacillus megaterium bacterial solution comprises using the culture method which is liquid deep fermentation, inoculating the nitrogen fixation Bacillus strain into the sterilized triangular flask containing fermentation culture medium, where the medium comprises 0.5% starch, 0.5% glucose, 0.03% yeast extract, 0.01% manganese sulfate, and 0.01% vitamin B12, where the pH is 7, the fermentation condition is: the culture temperature is 35 degrees C, the stir speed is 150 revolutions/minute, pH value is 7.2, stirring and culturing for 10 hours, so that the viable cell content is 1010 pfu/ml, obtaining fermentation liquid, adding disodium hydrogen phosphate and calcium chloride, flocculating, using plate frame filter pressing method to obtain bacterial sludge, blast drying bacterial sludge at 47 degrees C until the water content is 30%, cyclone separating to powder, placing the powder in a crusher to crush, sieving with 30-mesh sieve to obtain powder. The preparation of yeast inoculum comprises inoculating the yeast strain into the sterilized fermentation tank containing fermentation culture medium, where the fermentation culture medium comprises 20% potato starch, 2% glucose, and 1% corn steep liquor, pH is 7, the fermentation condition is: ventilation ratio is 2:1, culture temperature is 29 degrees C, stir speed 150 revolutions/minute, the dissolved oxygen not less than 30%, the pH value is not less than 6.8, stirring and culturing for 3 days so that the viable cell content is 108 pfu/ml, obtaining fermentation liquid, adding disodium hydrogen phosphate and calcium chloride, flocculating, using plate frame filter pressing method to obtain bacterial sludge, blast drying bacterial sludge at 47 degrees C until the water content is 30%, cyclone separating to obtain powder, placing the powder in a crusher to crush, sieving with 30-mesh sieve to obtain a powder. ACTIVITY - Fertilizer.