Abstract:Hemp protein were used as raw material to study on decolorization of hemp protein processed by different decoloring agent（organic reagents，activated carbon）.On the basis of single factor test，borthogonal experiments was applied to optimize the extraction parameters of active carbon powder，adsorption time and decolorization temperature.The results indicated that the optimum decolorization effect was obtained from the treatment conditions of 3%active carbon powder under conditions of decolorization temperature 50℃ and adsorption time 60 min.The hemp protein brightness value reached 71.8 and the recovery rate of hemp protein was up to 91.45%.