NOVELTY - Microbial organic fertilizer comprises (in wt.%): straw (65-70), flour (12-15), lime (1), mono-potassium phosphate (0.5) and water (13.5-21.5), where the straw is cornstalk, sorghum stalk, bean stalk and/or wheat stalk, and the flour is corn flour or bean powder. A liquid associated strain NEM which takes up 5-10 wt.% of the total weight of straw, flour, lime, mono-potassium phosphate and water, is prepared by (i) providing e.g. Bacillus subtilis and Candida utilis; (ii) culturing the strains; (iii) obtaining strain mixed liquid; and (iv) performing anaerobic fermentation.    USE - Used as a microbial organic fertilizer.    ADVANTAGE - The fertilizer: includes rich phosphatase, protease and aminopolypeptidase which are produced by mixed culture fermentation to improve the fertilizer utilization ratio and accelerate the plant root growth by absorbing more nutrients, and as the root is well developed, the growing plant feeds back rich nutrients to soil, which promotes microbial reproduction in soil and consequently, the virtuous cycle helps soil reclamation and achieves the purpose of soil renovation; is simple to produce and is economical.    DETAILED DESCRIPTION - Microbial organic fertilizer comprises (in wt.%) straw (65-70), a flour (12-15), lime (1), mono-potassium phosphate (0.5) and water (13.5-21.5). A liquid associated strain NEM takes up 5-10 wt.% of the total weight of the straw, flour, lime, mono-potassium phosphate and water, where the straw is cornstalk, sorghum stalk, bean stalk and/or wheat stalk, and the flour is corn flour or bean powder. The liquid associated strain NEM is prepared by: (i) providing Bacillus subtilis (7-9), Candida utilis (7-9%), Bacillus megaterium (7-9%), Bacillus mucilaginosus (7-9%), Lactobacillus plantarum (15), photosynthetic bacteria (15) and Pantoea agglomerans (34-42); (ii) respectively introducing purified B. subtilis, B. megaterium, B. mucilaginosus, L. plantarum, the photosynthetic bacteria and P. agglomerans into a triangular flask from a slant culture, and culturing for 24 hours by oscillating, and introducing C. utilis into a triangular flask from the slant culture and culturing for 48 hours by oscillating; (iii) mixing the cultured strains to form a strain mixed liquid and introducing into a fermentation seed tank; and (iv) preparing the culture medium of the seed tank with (in %) brown sugar (6), bean pulp (1-2), mono-potassium phosphate (0.5), sodium chloride (0.15), light calcium carbonate (1), peptone (0.5) and water (balance maount), regulating the initial pH to 7 and regulating the temperature to 121 degrees C, and sterilizing for 30 minutes, cooling to 30 degrees C and introducing the coolant that takes up 4% of the total material in the seed tank to the strain mixed liquid, performing anaerobic fermentation for 48-72 hours at 32 degrees C at 180 revolutions per minute and when the pH reaches 4.8 and the viable count reaches 150,000,000/ml, terminating fermentation to obtain the liquid mixed strain NEM. AN INDEPENDENT CLAIM is also included for preparing the microbial organic fertilizer, comprising: (i) crushing straw into 5-7 mm granules; (ii) weighing (in wt.%) straw (65-70), flour (12-15), lime (1), mono-potassium phosphate (0.5), and water (13.5-21.5), and mixing for 3-5 minutes; (iii) introducing the obtained mixed material into a pressure container, feeding vapor to the pressure container so that the air pressure in the pressure container increases to 1.5-2 MPa, heating at 160-180 degrees C, sterilizing for 10 minutes and delivering the material into a fermentation tank; and (iv) introducing liquid mixed strain NEM that takes up 5-10% of total material in the fermentation tank, performing anaerobic fermentation for 72-96 hours at 37 degrees C, when the pH reaches 4.5-5 and the viable count reaches 200,000,000/ml, terminating fermentation, taking the material out of the fermentation tank and packaging.