Abstract: This paper studied the comprehensive processing of oil, protein and starch from wheat germ.The results showed that the optimal conditions for wheat germ oil extraction by supercritical CO2 fluid were: extracting pressure 30MPa, extracting temperature 50℃, and extracting time 2h. The optimal conditions for extraction of wheat germ protein by alkali-processing were: extracting pH value 10, extracting time 60min,extracting temperature 45℃, Solid liquid, and extracting rate 66.16%, and pH value of acid-depositing was 4.2, with yield rate 54.16%. The optimal conditions for extraction of wheat germ protein by papain- processing were: extracting time 60min, extracting temperature 60℃, and quantity of papain added 3000Ug, with extraction rate summed up to 97.98%, with pH value of acid-depositing 4.2, and yield rate 78.15%. After protein being extracted, wheat germ starch was get through remnant being wished by alkai solution.

Key words: wheat germ, protein, papain