NOVELTY - Producing bio-organic fertilizer using municipal domestic sludge involves 1) taking municipal domestic sludge, auxiliary material, controlling water content of 55-65%, carbon/nitrogen content of 25-30%, 2) preparing sludge and auxiliary material by 2-3%; adding microorganism fermenting strain I, mixing uniformly, adding biological organic fertilizer to fermenter; 3) turning the material feed once and airy two hours, then turn feed once a day; continue to ferment for 10 days in the fermentation tank; adding yeast strain II.    USE - For producing bio-organic fertilizer using municipal domestic sludge (claimed).    ADVANTAGE - The method is of environmentally-friendly, bio-organic fertilizer obtained has good fertilizer effect, which is good for plant to absorb biological organic fertilizer.    DETAILED DESCRIPTION - Producing bio-organic fertilizer using municipal domestic sludge involves 1) raw material preparation: taking municipal domestic sludge, auxiliary material, measuring the water content of the sludge and auxiliary material and all kinds of nutrient content, the proportion of sludge and auxiliary material, controlling the water content of 55-65%, carbon/nitrogen content of 25-30%, 2) preparing sludge and auxiliary material by 2-3%; adding microorganism fermenting strain I, mixing them uniformly, adding biological organic fertilizer to the fermenter in which the high voltage is not greater than 1.2; 3) 3) the first day of feeding, turn materials without ventilation, the second days of fermentation tank material temperature rise to 50 degrees C, start turning machine, turning the material feed once and airy two hours, then turn feed once a day; 4) on the third day rise to the material stack temperature to 60 degrees C, control the temperature to 55-65 degrees C, maintaining for 3-4 days, killing a large number of pathogenic microorganisms in the sludge and parasite eggs; 5) continue to ferment for 10 days in the fermentation tank, the sludge mixed material without smell, basically, when the temperature is reduced to below 40 degrees C, the water content is reduced to less than 40%, then adding yeast strain II (1% proportion), then carrying out secondary fermentation, after water content to 35%; 6) fermentation, which meets the requirement of the material, crushing, metering and packing to give a powder organic fertilizer, but also capable of carrying out pelleting according to the requirement, processing into granular organic fertilizer.    DESCRIPTION OF DRAWING(S) - The figure shows a craft flow chart of method for producing bio-organic fertilizer using municipal domestic sludge. Drawing includes non-English language text.