The invention belongs to the field of rock mechanical property testing, and particularly relates to a pendulum impact rock shear creep test machine and method. According to the technical scheme, the pendulum impact rock shear creep test machine comprises an energy accumulator, a loading system and a pendulum, the energy accumulator provides a stable pressure for the loading system, the loading system enables a rock sample to be in a shear creep state, and the pendulum performs a tangential dynamic impact on the rock sample through the loading system. The energy accumulator is used for controlling the rock sample to be in the shear creep state, then a pendulum is used for performing a tangential dynamic impact, the influence of tangential dynamic load generated by the tangential dynamic disturbance on the shear creep state of the rock sample is studied, and then the rock shear creep instability mechanism induced by dynamic disturbance is studied.