Abstract: The shape of cast blasting pile in open-pit mine is extremely important for the evaluation of the blasting effect and the design of the subsequent stripping process. The laser scanning methods currently used in the field have many problems such as the equipment is heavy, the procedures is complicated, long time-consuming, restricted installation positions, safety risks in operations, and scan blind spots. In response to the above problems, after repeated field trials, the research puts forward a method for measuring the shape of the blasting pile based on the tilt photography of the drone. A detailed design of the field acquisition program is carried out, and the key algorithms of the internal data processing are analyzed: image matching based on the sift algorithm, three measurement of the beam method in the area cyberspace, and dense image matching based on PMVS. The research results show that the model error fully meets the level I accuracy requirements of the scale 1:500 surveying and mapping results. Compared with the traditional technology, the UAV surveying and mapping technology has high surveying and mapping operation efficiency, low equipment system cost, high safety factor, and fewer operators. Features such as accurate surveying and mapping results.