Abstract: The best process for extracting protein from rice residue with enzyme was determined by orthogonal test. The protein content of obtained protein powder is 80.1%,and the yield rate is 55.6%. Its solubility is good. Then the obtained protein powder was used as microcapsule wall material to prepare powdered oil with high rice protein content. The product was detected,scanned by electron microscope and evaluated. The results showed that the protein content of prepared microcapsule is 26.5%,the fat content 26.7%,the surface oil content 2.5% and the embedded rate 95.1%. The surface of the microcapsule is smooth,no layer phenomenon,as well as no particles being linked to the wall. The indexes meet the qualification of powdered milk for feeding.

Key words: rice residue, enzymatic hydrolysis, protein, microcapsule wall material