In this research, we attempt to improve the impact strength and the viscosity of PA (polyamide) by blending two elastomers, TPU (thermoplastic polyurethane) and POE-g-MA (maleic anhydride-grafted polyethylene-octene elastomer), in PA matrix with twin screw extruder. The ratio of blending is 80PA/20TPU and 80PA/20TPU/20POE-g-MA (66.66PA/16.67TPU/16.67POE-g-MA). Results indicate that POE-g-MA improves the low viscosity of PA and TPU during the blending process, and also their compatibility. Thus, the 80PA/20TPU/20POE-g-MA blend has better tensile stress and elongation than 80PA/20TPU blend, and furthermore POE-g-MA significantly improves the impact strength of PA, even to super-toughness grade. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 115: 1278-1282, 2010