The invention provides a method for processing microorganism synthetic feed using animal manure as a raw material. The method comprises the following steps of: diluting bacillus flora powder in water to prepare aqueous solution containing bacillus floras, adding the obtained aqueous solution into fresh terrestrial animal manure, uniformly stirring the mixture, adding all aqueous solution containing anaerobe floras into the terrestrial animal manure treated by the step C, uniformly stirring the mixture, flipping the terrestrial animal manure, controlling the temperature rise caused by the fermentation of the terrestrial animal manure to below 80 DEG C, sterilizing the terrestrial animal manure by the temperature rise caused by the fermentation, and stacking the terrestrial animal manure for 68 to 76 hours; and mixing the synthetic feed product obtained by the treatment of the terrestrial animal manure with corn and / or soybeans. The method aims to provide a method for method for processing the microorganism synthetic feed using the animal manure as a raw material and a product thereof, and the product has the advantages of rich nutrition, rich amino acid, good palatability, big animal feed intake and low feed cost, and can improve the disease resisting ability of livestock, poultry and aquatic animals.