Abstract: The traditional investigation method of high-altitude collapse geological hazard has hidden danger to the operator with shortcomings such as high labor intensity, high cost, low efficiency, inaccuracy data. The UAV remote sensing technology is currently used in the exploration and development stage in many fields. Based on this technology, the high-altitude collapse monomer of Xianyutun in the Youshan River scenic area was introduced. Through image stitching and geometric correction, 3D real scene model and DOM of 0.487m precision were realized. The accuracy of aerial photography was tested and analyzed. It is showed that the image data obtained by this technology have great development space and research significance for the investigation of collapse geological hazards in the future.