Abstract: The analysis of rock slope stability is an important task in engineering geological exploration and design, which mainly includes four parts: the measurement of the occurrence of rock mass discontinuities, the statistics of dominant discontinuities, the analysis of discontinuities stability and the compilation of report. At present, there are the following problems: first, the traditional artificial field measurement method is generally adopted for rock discontinuities measurement, which has the problems of low efficiency, limitation of terrain to measurement range and poor representativeness of discontinuous data. Second, although there is a separate software for discontinuity statistics and discontinuity stability analysis, manual conversion is needed to complete the above two work, which has low efficiency, cannot be analyzed in batches and can make mistakes easily. Third, there is no one-stop software to complete all the above work, let alone automatic generation of analysis reports. To solve above problems, the paper uses Excel-DNA technology to develop a one-stop analysis software for rock discontinuities. This software includes using 3D real model to calculate discontinuance occurrence, discontinuance statistics, discontinuance analysis and report preparation and other functions. Compared with the traditional analysis method, the results are correct and their accuracy is reliable. Using software can effectively improve the standardization level of exploration and design, greatly promote the production efficiency and the quality of results, and has good practical value.