Abstract: Experiments are performed by Metravib dynamic mechanical analyzer about the attenuation and dispersion of pump-oil and glycerol saturated Peng-shan sandstones with two kinds of porosities. The frequency and temperature of tests are natural earthquake. The results show: ① The attenuation peak of pump-oil saturated Pengshan sandstone appears to be thermo-activated relaxation. ② Young’s modulus and elastic wave velocity of saturated Pengshan sandstones reduce with porosity and temperature increasing, and rise with viscosity coefficient of saturated liquid and frequency increasing. ③ Frequency dispersion attenuates as temperature increases, enhances as frequency rises. The data provides the experiment foundation for theoretical research of seismic waves.