Garden organic fertilizer prepared by municipal sludge fermentation and preparation method thereof

The invention discloses a garden organic fertilizer prepared by municipal sludge fermentation and a preparation method thereof, and belongs to the technical field of organic fertilizer preparation. The garden organic fertilizer comprises the following components: fermented pool bottom sludge generated by an municipal sewage treatment plant, fermented sheep manure, fermented wheat and unfermented raw wheat according to a weight ratio of 70:(15-20):(5-7.5):(5-7.5). The preparation method comprises the following steps: pretreating pool bottom sludge, deodorizing the sludge, adjusting indexes of the pool bottom sludge, crushing sheep manure, carrying out mixing and fermenting, adding a deodorizing component, and carrying out dehydrating and granulating. A fermentation process is adopted, and the sheep manure and the wheat are added into the municipal sewage sludge, so that the fertility state of the organic fertilizer is effectively improved. The preparation method has practical operability and can be used for la