In order to study the relationship between strain rate and mechanical performance of 2219 aluminum alloy， through the uniaxial tensile test in 6 different strain rates in 0.05、0.10、0.15、0.20、0.30、0.40 mm·s^-1， the stress-strain curve of 2219 aluminum alloy was obtained under different strain rates. In order to accord with the actual production situation， selected 4 larger strain rate in 0.075、0.30、0.40、0.55 mm·s^-1， changed the material state， conducted the uniaxial tensile test and metallographic analysis， the variation trend of mechanical performance of 2219 aluminum alloy was tested and verified under different strain rates. The results show that mechanical performance of 2219 aluminum alloy is insensitive in yield strength and tensile strength. As the strain rate goes up， percentage elongation has an upward trend. According to the actual situation of processing equipment， a higher deformation rate （recommended not to exceed 0.4 mm·s^-1） is chose to improve processing efficiency.