Anti- dizzy inner rearview mirror as a high reflectivity mirror when it wasn't irradiated by the ray from backside.While driving at night and the main lights of the car from back side is illuminating the anti- dizzy inner rearview mirror , the mirror will change its reflecting rate at a instant, and darken itself, to reduce the stimulation generated by the main lights of back car when it illuminates the anti- dizzy inner rearview mirror inside the front car to the driver.