Soy protein concentrate is made from soybeans. After crushing, peeling, extracting, separating, washing, drying and other processing techniques, the oil, low-molecular soluble non-protein components (mainly soluble sugar, ash, alcohol) in soybeans are removed. After solubilizing protein and various odor substances, etc.), the soy protein product containing 65% (dry basis) or more protein (N×6.25) is prepared.