The invention provides a method and device for determining seismic property data body. The method comprises the steps that the sub-azimuth angle stacking is conducted on a regularized azimuth angle gather, obtaining a plurality of azimuth gather data, wherein the regularized gather includes offset, azimuth angle, and time; the centroid frequency of the plurality of azimuth angle gather data can berespectively calculated, obtaining a centroid frequency gather; the maximum centroid frequency and the minimum centroid frequency corresponding to the same time in the centroid frequency gather respectively form a maximum centroid frequency gather and a minimum centroid frequency gather; the maximum centroid frequency gather and the minimum centroid frequency gather respectively form the seismicproperty data body. The invention is advantageous in that the seismic property data body cannot be affected by collected footprint or superficial layer interference, and the reliability of the predicted result can be improved.