Different lithological rocks have different content of radio-elements such as uranium,thorium and potassium.Even if they are the same lithological rocks,as a result of different cases and age of formation, different geological evolvement process, their content of radio-elements also is different .According to this character of radio-elements in rocks,using airborne gamma-ray spectrometric data,using the statistical multi-analysis methods,this paper analyzes airborne gamma-ray spectrometric data,makes out dynamic cluster chart, compares with geological map, compartmentalizes geological element, then offers some gist for the next geological work in this area.