NOVELTY - Microorganisms belonging to Paenibacillus polymyxa strain NJY10 (CGMCC NO. 3187) and Bacillus subtilis strain NJY-IVI (CGMCC NO. 3179) capable of preventing Fusarium wilt of cropped melon, are new.    USE - The P.polymyxa and B.subtilis are useful for producing microbial organic fertilizer and for preventing Fusarium wilt of cropped melon (both claimed).    ADVANTAGE - The microbial organic fertilizer exhibits rapid fertilization effect.    DETAILED DESCRIPTION - Microorganisms belonging to Paenibacillus polymyxa strain NJY10 (CGMCC NO. 3187) and Bacillus subtilis strain NJY-IVI (CGMCC NO. 3179) capable of preventing Fusarium wilt of cropped melon, are new. The P.polymyxa and B.subtilis are Gram-positive, bacilliform, catalase positive, positive for starch hydrolysis, Voges-Proskauer (VP) positive, negative for methyl red test, negative for cellulose decomposition, positive for gelatin hydrolysis, positive for nitrate reduction, capable of using citrate and producing ammonia, fermenting glucose to produce acid and gas and fermenting xylose, L-arabinose and mannose to produce the acid. The P.polymyxa is negative for indole test and B.subtilis is positive for indole test. INDEPENDENT CLAIMS are included for the following:    (1) microbial organic fertilizer produced by using above-cited microorganisms; and    (2) method for producing microbial organic fertilizer, involves (a) separately inoculating strain NJY10 and strain NJY-IVI in potato dextrose agar (PDA) culture medium, culturing the strains at 30-38 degrees C at a speed of 180-300 rotations/minute and collecting the culture, where the amount of bacteria in the fermentation broth is 5x 109/ml, (b) fermenting solid organic material of decayed pig manure heap and rapeseed meal by adding 50 l of bacterial liquid at 50 degrees C for 5 days, such that the number of bacterial strain is 1x 108/g and obtaining solid pig manure heap microbial inoculum of NJY10, solid rapeseed meal microbial inoculum of NJY-IVI, solid microbial inoculum of strain NJY-IVI and solid microbial inoculum of strain NJY10, (c) mixing solid microbial inoculum of strain NJY10 with solid microbial inoculum of strain NJY-IVI in proportion of 1:1 based on pig manure heap and rapeseed meal microorganism enzyme mixture and obtaining solid mixed microbial inoculum of pig manure and rapeseed meal microorganism enzyme mixture, sufficiently mixing 50-70 %volume of solid single microbial inoculum and mixed microbial inoculum of pig manure with 30-50% of rapeseed meal microorganism enzyme mixture, aging the mixture for 2-3 days for 2 times, evaporating moisture of the microbial organic fertilizer to lower than 30% at 60 degrees C and separately obtaining the NJY10 single-strain microbial organic fertilizer, NJY-IVI single-strain microbial organic fertilizer, and mixed microbial organic fertilizer of NJY10 and NJY-IVI and packing the mixture.