Abstract: Based on testing of fabric static voltage,the influence of nano-particles treatment on the antistatic property of polyester fabric was studied.Through analyzing particle size in the residue of dye bath,the aggregation state of nano silver in dye bath was investigated in the one-bath and two-step treatments respectively.SEM was used to analyze the deposition state of nano silver on the treated fabrics.The results show that the treatment of nano silver particles can greatly improve the antistatic property of polyester fabric.The static voltage of polyester fabric decreased by 60.4% when the percent of nano silver was 1.5% after one bath treatment.However,with respect to the two-step treatment,there was a critical value in terms of the added amount of inorganic nano particles,lower than this value,would undesirably cause the rise of static voltage of the treated fabric;after reaching this value,the static voltage began to drop.The dispersant in dispersive dyestuff could disperse and protect nano silver particles effectively.The treatment of nano silver blended with nano gold and nano zinc oxide is a very efficient method in decreasing the static voltage of polyester fabric.After treatment,the static voltage of polyester fabric decreased by 77.7% due to their synergistic effect.