Abstract: Defatted rice bran was an important nutrition source of high quality whole plant protein. Among them, the content of albumin was the highest and globulin followed by. Extraction technology on albumin and globulin of rice bran was studied. The influence of different factors on the protein yield was discussed. Determined the optimal conditions of the process. And the composition of amino acid were measured. The result showed that the optimal processing parameters of albumin liquid ratio was 1 ∶14, extraction time was 3h, temperature was 45℃, albumin yield could up to 14.68%. Globulin optimum parameters for NaCl density was 3%, liquid ratio was 1∶10, extraction time was 2h. temperature was 50℃, globulin yield was 4.28%. The essential amino acid content in the two proteins was approached than that in the FAO/WHO recommended adult pattern. It was the good quality source of protein plant.