Addressing the issues of low efficiency and significant errors in traditional topographic mapping of cement mines, drone oblique photogrammetry technology is adopted for topographic mapping. This method offers the advantages of flexible mobility, easy operation, and high efficiency, effectively replacing traditional manual measurement methods. The basic principles and operational processes of this technology are elaborated, and technical highlights and application effects are analyzed through a specific case study of a cement mine. The results indicate that the mapping points obtained by this method align well with the actual points, with minimal errors. It demonstrates good applicability and promotional value in topographic mapping of cement mines.