Abstract:The effects of pH, microwave time, microwave power, solid/liquid ratio (m/V) on the extraction rate of protein from cereal industry by-product broken rice were investigated with coomassie brilliant blue stain protein method. Results showed that the optimal parameters with microwave treatment were as follows: pH 10.0,extracting for120 s at 390 W power by microwave and solid to liquid ratio of 1:10, under which the protein extraction rate was 71.2%.