Abstract: The stability analysis of jointed rock slope was conducted by using the software RFPA-Slope that is incorporated with strength reduction theory. The failure surface of slope and relevant safety factor were thus displayed directly. The influences of joint connectivity, location, obliquity and rock bridge length on the failure mode and magnitude of safety factor were investigated. It was proved that the joints were the major influencing factor on the failure mode of jointed rock slope. In addition, the failure process as shown by RFPA-Slope is significantly meaningful for the investigation of failure mechanism of jointed rock slope. The case study indicates that RFPA-Slope can rather rationally predict both safety factor of slope and the corresponding shape and position of the potential slip surface. Accordingly, practical applicability of the proposed technique to complicated cases is verified.