Dajingpo Airborne Geophysical Test Site is the first airborne geophysical(magnetic, gravity and electromagnetic)integrated test site in China, at the sponsor of 863 project. The selection of integrated test site is an important and difficulty work, because it need to consider of all the conditions for the test of magnetic, gravity and electromagnetic systems. Therefore, the selection of integrated test site need to consider the basic principles as follow: the interfere is small in the test site and around; there is diversity in topography; there is affluent in geology, and possess of iron points (or iron deposits) are best; magnetic, gravity and electromagnetic abnormities are obvious., and so on. According to the basic principles and methods of "Select a large region first, and the site wherein ", after the synthetical analysis and contrast in topography, geology and geophysical materials and check in field, Siziwangqi Test Site is filtered from all the county, then do more detailed work to Siziwangqi Test Site, Dajingpo Test Site is determined in the Dajingpo area at the NE corner of the Siziwangqi Test Site.