The wind-induced vibration of the car rearview mirror blurs the image, which brings great danger to driving safety. The method of two-way FSI（Fluid-Structure Interaction）was applied to the numerical simulation on the vibration problem of rearview mirror caused by airflow around the Driver model. STAR-CCM+ and Abaqus were used for co-simulation. According to the comparison and analysis of the vibration characteristics of fixed rearview mirror as well as the rearview mirror with wind-induced vibration at different flow velocity and under the condition of side wind, the conclusion can be drawn as follows: as it is affected by the vehicle body, the vortex falling from the edge of mirror is difficult to develop in the wake, which limits the vortex-induced vibration. The mirror vibration is dominated by the wind speed, the vibration frequency is maintained at 27.8 Hz，and the higher wind speed results in the larger amplitude. When there is crosswind，force of the flow field on the rearview mirror is disordered, dominant frequency disappears in the low frequency area, and the vibration intensifies. In this situation, the vortex is fully developed in the wake, which induces the strong vibration of about 164.5 Hz.