Abstract: In this research,the protein is extracted by water from de-fatted soybean meal and purified by acidprecipitation In order to control the bitter peptide taste effectivily,double enzymolysis is used for the absorption byabsorbent carbon .The process technique and parameters of soy peptide are presented in this article and can beapplied to large-scale industrial production.

Key words: Soy peptide Enzymolysis Bitter peptide