the present invention relates to a high yield process for producing soluble dietary fiber from corn hull . more specifically , the present invention comprises removing starch and protein with enzymes from corn hull which is by - product of wet - milling process for production of corn starch , extracting the resultant with alkaline solution to form a alkaline extract , treating the alkaline extract with enzymes , and drying the enzyme - treated solution , to produce dietary fiber with low viscosity and containing hemicellulose as a major component at high yield .