Abstract: Slope stability of open-pit mine is very important to mine safety. Accurate identification of slope parameters is the core link to ensure mine safety. Traditional slope parameter acquisition methods have limitations such as low efficiency, single data, and difficulty in achieving high-frequency coverage of the whole region. In view of the above problems, a method for checking the slope parameters of open-pit mine based on the full process automatic modeling of unmanned aerial vehicle (UAV) is proposed. Through the breakthrough of intelligent perception, automatic modeling and model analysis technology, the unmanned and global monitoring of the key parameters of mine slope is realized. Taking the large open-pit mine in Inner Mongolia as the research object, based on the UAV intelligent hangar technology, the automatic route planning method of UAV is optimized. The autonomous operation process of airborne lidar is introduced. The efficient return mechanism of batch data based on internal network penetration is studied. The automatic solution process of point cloud data suitable for open-pit mine is proposed. The local update strategy of point cloud is designed to reduce the amount of data processing. Based on the point cloud data, the digital surface model (DSM) of open-pit mine is established. Through the extraction of flat plate and slope surface and skeleton line, the global analysis of key parameters such as flat plate width, step height and slope angle is realized. The research result shows that this method realizes the automatic modeling of the whole process of point cloud data based on UAV hangar, and the degree of automation is 100%. The accuracy of slope parameter extraction is significantly improved compared with that of conventional mine manual measurement. The error of flat plate width and step height is less than 0.5 m, and the error of slope angle is less than 0.5°. The high-density collection and analysis of the whole mine slope can be realized by a single operation of the UAV, which effectively improves the accuracy and efficiency of the open-pit mine slope monitoring, greatly reduces the cost of manual inspection, and provides reliable data support for mine safety production management and supervision department verification.