Shuttle Radar Topography Mission (SRTM) data were used to evaluate the clearance environment and the siteselection evaluation efficiency of radar was effectively improved. In this paper, the comparative experiment of weather radar clearance environment assessment is carried out by using manual measurement data and SRTM data. Error analysis of this method suggested that the evaluation algorithm of weather radar clearance environment based on SRTM was matching with the artificial measured data. The calculation error was significantly reduced when corrected with azimuth correction and distance correction algorithms.