The main principle of the compost turning machine is to convert organic matter in pig manure into fertilizer through the action of microorganisms. During the fermentation process, microorganisms decompose the organic matter in pig manure into simple compounds like carbon dioxide and water. At the same time, the metabolic products of the microorganisms and undigested residues form fertilizer. The stirring and aeration of the compost turning machine effectively control the heat and humidity generated during the fermentation process, promoting the growth and reproduction of microorganisms, accelerating the decomposition of organic matter, and the formation of fertilizer.