Considering the experimental performances of the resonant column test and cyclic triaxial test and the existing problems of relevant researches，a series of experiments are conducted on sand-rubber mixtures by employing the two different instruments.The dynamic shear modulus and damping ratio are evaluated for different rubber particle contents in a wide band of strain. The results show that the maximum dynamic shear modulus Gmax obtained by the resonant column test is much larger than that of the cyclic triaxial test，which is mainly caused by the larger initial shear strain of the cyclic triaxial test. Due to this reason，it is reasonable to predict dynamic shear modulus ratio G/Gmax and damping ratio curve using the Gmax obtained by the resonant column test in a wide strain range. Also，the increase in rubber particle content results in larger damping ratio at small shear strain level，which is mainly caused by the larger damping properties of rubber particles. When the shear strain increases and exceeds a certain critical value，the damping ratio decreases with the increase of rubber content，which is due to the decrease of hysteretic damping corresponding to dynamic stress-strain relationship.