Abstract: A method for fermentation of a stockbreeding waste, especially fowl droppings which comprises mixing the stockbreeding waste, synthesized wollastonite and concentrated sulfuric acid to condense and granulate the mixture, adjusting the resultant granules to pH 6.0-7.85, water content of 65-78.5% and a temperature of 25.degree.-35.degree. C. and spontaneously fermenting the granules at a place not influenced by rainfalls is disclosed. The product obtained by the present method is usable as fertilizer, a soil quality-improving material, a material for seed microorganisms, etc.