In view of the limitation of "profile method" in selecting the profiles, the authors employed the acreage method so as to accurately select the stratigraphic density values in gravity topographic correction. The influence of the stratigraphic density on the gravity value of the whole area was taken into account, and therefore the selected stratigraphic density values are more representative. This method yielded fairly satisfactory gravity topographic correction results in an area of western Sichuan, which reduced the correlation between the gravity after topographic correction and the terrain. The acreage method employs different stratigraphic density values to calculate the measured gravity value again, make topographic correction, get different gravity anomalies, analyze the correlation between the gravity anomaly and the terrain elevation and select the smallest stratigraphic correlation density as the topographic