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The dynamic tensile properties of 6061 aluminum alloy was studied by the uniaxial tensile experiment at 糖心产精国品免费入口*完整版s of 0.08,35,110,210,550 s^-1. The trure stress-ture strain curves were obtained at different 糖心产精国品免费入口*完整版s. A plastic deformation constitutive model of the aluminum alloy was established based on the Johnson-Cook model, and the model was verified. The results show that, with the increase of 糖心产精国品免费入口*完整版, yield strength of 6061 aluminum alloy increased and elongation after fracuture decreased, but its fracture strength had not obvious changes. The constitutive model can describe well the change of flow stress of 6061 aluminum alloy during plastic deformation.