Abstract: A method for producing aerobic-type single cell protein using the autolysis process, comprising the following steps: precipitation and concentration, centrifugal dewatering, drying, sterilization, smashing and packaging. The materials with moisture content of 78%˜85% after centrifugal dewatering are dried after the autolysis. The present invention and its products employ the autolysis process. During the autolysis, macromolecular nutrients and cell walls are decomposed by autolytic enzymes, to produce high content of free amino acids, free nucleotides; besides, cell wall polysaccharides are decomposed and the cells produce permeability to ensure an active material can flow out of the cell which can be directly absorbed by animals.