Abstract: As a kind of basement gas reservoir in the inland basins of China, Dongping basement gas reservoir is characterized by complex lithologies, developed fractures and greatly different development effects in single wells. Affected by basal water invasion, the gas yield of Dongping basement-rock gas reservoir decreases, and the reservoir enters the stage of large-scale adjustment. In order to realize the potential tapping targets and to rapidly deploy risky wells, it is necessary to qualitatively evaluate the standard of high-yield gas wells. Seismic frequency spectrum attenuation reflects the strong absorption of the high frequency energy of seismic waves by gas-bearing intervals and can better predict the gas distribution in the formation. Based on which, Discrete Fourier Transformation method is used to perform spectral decomposition of the seismic time-frequency data for the favorable gas-bearing areas in Dongping basement gas reservoir, and the frequency spectrum attenuation of gather profile is analyzed. The results show that the phenomena of high frequency attenuation and low frequency enhancement exist in the areas penetrated by high-yield gas wells. By combining well production and lithologies, a set of standards for gas well classification and evaluation is established for Dongping basement gas reservoir with the coincidence rate of 83.3% in single wells, which verifies the reliability of the classification and evaluation standards.