A drone-borne 3D laser scanning measurement system was used to scan and measure an open-pit mine,and comprehensive and informative mass point cloud data of the open-pit stope were quickly obtained.By constructing a fine 3D solid model and comparing it with the traditional measurement data,and analyzing the key point information of the typical profile,a measurement accuracy of better than 5 cm was obtained under the complex working conditions of the open-pit mine.The surface topography of the open pit was scanned and measured in two stages after blasting,and the amount of ore recovered in two stages was quickly obtained,providing accurate and timely data support for timely adjustment of mine production plan and dynamic management of reserves,and significantly improving the digital management level of the open-pit mine.