Abstract: Enzymatic washing of the reactive dyed fabrics aided by ultrasonic wave was proposed,and the optimal process conditions were determined through experiments: temperature,50℃;enzyme concentration,0.15 g/L;liquor ratio,1∶20;and time of treatment,8 min.Compared with the conventional soaping and enzymatic washing under these conditions,this ultrasonic wave aided enzymatic washing process can cut down the dosage of enzyme,improve color fastness,simplify the process,and widen the applicable range of enzymatic washing.