Method for preparing organic fertilizer by combining pig farm wastewater MAP precipitated sludge with banana stems and leaves

The invention discloses a method for preparing an organic fertilizer by combining pig farm wastewater MAP precipitated sludge with banana stems and leaves, which comprises the following steps: mixingpretreated pig farm wastewater MAP precipitated sludge with pretreated banana stems and leaves, adding a complex microbial inoculant into the obtained mixture, fermenting, pulverizing the fermented material, and granulating to obtain the organic fertilizer. The pretreated pig farm wastewater MAP precipitated sludge and banana stems and leaves are adopted as fermentation raw materials, the use amount of the fermentation raw materials is adjusted, strains adopted for fermentation are selected and matched, the water content of the fermentation raw materials, the initial water content of a fermentation heap and the stacking time are controlled, a more suitable growth environment is provided for the complex microbial inoculant, therefore, the fermentation effect is better, and the quality of the obtained organic fertil