NOVELTY - Preparing fertilizer by processing kitchen garbage, sewage sludge and household garbage, comprises sorting organic substances from household garbage using a sorting device, separating out non-degradable substances from kitchen waste and crushing to obtain slurry, sending organic substances of domestic waste into a pulping machine and then pretreating using a pre-treatment unit, adding the slurry into the pulping machine, adding water from a feed port of the machine and then homogenizing to form fine uniform slurry, adding the sludge and then evenly stirring and decomposing dioxin in slurry.    USE - The method is useful for preparing fertilizer by processing kitchen garbage, sewage sludge and household garbage (claimed), where the for agricultural field.    ADVANTAGE - The method allows simple and economical preparation of the fertilizer with high-quality thus protecting and improving the ecological environment. The fertilizer enhances the yield and quality of the crop, and supports the sustainable development of agriculture.    DETAILED DESCRIPTION - Preparing fertilizer by processing kitchen garbage, sewage sludge and household garbage, comprises sorting organic substances from household garbage using a sorting device, separating out non-degradable substances from the kitchen waste and crushing to obtain slurry, sending organic substances of domestic waste into a pulping machine and then pretreating using a pre-treatment unit, adding the slurry into the pulping machine, adding a proper amount of water from a feed port of the machine in a water addition mode and then homogenizing until water content is more than 80% to form fine uniform slurry with size of 50-80 meshes, adding the sludge and then evenly stirring, decomposing dioxin in slurry, pumping the slurry into a microbial deep anaerobic fermentation by a pump, adding humic acid and sodium silicate mixture, EDTA as metal complexing agent, polyacrylamide as flocculating agent and yeast comprising Saccharomycetes, lactic acid bacteria, Aspergillus niger and methanogenic bacteria, carrying out anaerobic fermentation process and then separating and removing heavy metal, precipitating the mixture to remove dioxins and fermentation bacteria, dehydrating the slurry using dewatering material and adjusting the carbon phosphorus ratio and pH value, placing the slurry into a solar heating radiator temperature superconducting controlled fermentation chamber, performing enzymatic reaction by high-temperature mineralization reaction, killing pathogenic bacteria, adding the fermentation material with Trichoderma viride, Actinomyces to completely decompose dioxin, and carrying out a double-coordination production technique to produce the microbial organic fertilizer.