NOVELTY - Preparing fertilizer by (a) obtaining raw materials e.g. crop straw, (b) mixing raw materials, pretreating mixture and adding microbial inoculant, and (c) performing mesophilic fermentation by (i) stacking pretreated mixture, (ii) heating stacked mixture and fermenting mixture, (iii) breaking fermented mixture, fermenting mixture again and breaking into blocks, and (iv) adding 1 kg Bacillus single strain to blocks, controlling fermentation quality of blocks to obtain as fertilizer, crushing and sieving fertilizer, checking fertilizer, weighing and packaging fertilizer.    USE - The method is useful for preparing fertilizer used for promoting disease resistance and increasing yield of cabbage and scallion (all claimed).    ADVANTAGE - The method promotes rapid decomposition of agriculture organic waste and has increased nutrient conversion rate of 50.2% and prepares fertilizer with increased microorganism content of 2.95 billion/g.    DETAILED DESCRIPTION - Method for preparing fertilizer by performing biological fermentation using processed agriculture organic waste, involves (a) obtaining raw materials e.g. livestock manure, crop straw, vegetable waste, garden debris, household garbage obtained from rural area and waste derived from sewage and mushroom residue, (b) weighing the raw materials, mixing raw materials, pretreating mixture and controlling moisture content of the mixture to 55-60%, where 5 kg mixture comprises carbon to nitrogen ratio (C/N) of 20-25 and adding 1 kg microbial inoculant to the mixture for decomposing organic waste and (c) performing mesophilic fermentation by (i) stacking pretreated mixture into trapezoid shape with 1 m width and 2 m bottom length, where the volume of stacked mixture is not less than 5, (ii) heating stacked mixture for 1-3 days, increasing the temperature of the mixture to 60 degrees C and maintaining for 3 days without turning stacked mixture to kill Bacillus, Enterococcus faecalis, Ascaris egg, harmful pathogens and insect eggs in the mixture, turning the stacked mixture, stirring mixture once and heating at high temperature for 3 days, fermenting the mixture at 48-52 degrees C for 5-10 days, reducing the temperature of the mixture from 48 degrees C until the temperature inside the fermented mixture is equal to the temperature of outside environment, reducing the water content of the mixture to 30% or less, where the fermented mixture is dark brown in color and odorless, and fermenting the mixture for 3-6 days to prepare the mixture into bio-organic fertilizer, (iii) turning fermented mixture, breaking fermented mixture uniformly, transferring the upper portion of the stack to the lower portion and lower portion of the stacked mixture to the upper portion to obtain completely fermented mixture, fermenting mixture again, mixing the mixture uniformly and breaking mixture into blocks, and (iv) cooling the blocks, adding 1 kg Bacillus single strain to the blocks, controlling the fermentation quality of the blocks to obtain as fertilizer by maintaining 5% nitrogen, phosphate and potassium content in 45-55% fertilizer, where the fertilizer has 0.2x 108/g viable bacterial cell count and Ascaris eggs mortality rate of 100% and is free from intestinal bacteria, crushing the fertilizer, sieving crushed fertilizer, checking fertilizer, weighing and packaging fertilizer.