Abstract: The investigation and analysis of rock mass structural plane in rock slope is one of the basic work of slope stability analysis. However,the traditional method to obtain the structural plane of rock slope has some shortcomings,such as low efficiency,poor safety,high subjectivity,low digitization degree and cumbersome process. Based on the 3D reconstruction SFM algorithm,this paper deeply studies the reconstruction method of the high-precision 3D reality model of open-pit slope rock mass,and integrates the spatial and texture feature information of the high-precision 3D reality model of slope rock mass to build a visualization interactive system based on Opengl graphics library. The high-precision 3D model of rock slope is efficiently collected and visualized. At the same time,the theory of determining a plane by non-collinear three points is applied to the identification of structural plane to realize the interactive and accurate identification of rock mass structure. On this basis, the rock slope structural plane identification system is developed,and the rock slope stability is analyzed in detail by taking an open-pit mine slope as the research object and guided by the basic theory of rock mechanics. The results show that:the system can make the stability analysis and disaster prevention and control of rock slope more timely,efficient and accurate,and has a wide application prospect.

Key words: rock slope,UAV,slope stability,oblique photography,identification of structural plane