Abstract: Using a vibration tensile tester, the vibration tensile tests under different frequency and excitation force were conducted on Q235A steel. The effects of frequency and excitation force on the average load and yield strength of the steel were studied. The results show that comparing to those in regular tensile, both the average load and yield strength of the tested steel decrease in the vibration tensile, indicating an obvious volume effect. With the increase of excitation force, the yield strength and average load in different deformation stages of the tested steel decrease linearly. With the frequency decreasing, the yield strength and average load in different deformation stages first increases then decreases and reaches the largest value at 90 Hz.