The invention relates to a bridge vibration-damping power-generating illuminating device which comprises a pedestal, a cylinder, a pulley, a generator, a light spring, a rope and a weight and is characterized in that one end of the pedestal is connected with the cylinder, the pulley is arranged in the cylinder, the pulley is connected with the generator through a rotating shaft, the other end of the pedestal is connected with the light spring, the light spring is connected with one end of the rope, the other end of the rope is horizontally connected with the top end of the pulley, the top endof the pulley is vertically connected with the weight through the rope, the upper surface of the weight tightly leans against the lower surface of the cylinder, and the place where the weight tightlyleans against the cylinder is connected with a rubber thin mat. The invention has the advantages that the kinetic energy generated by vibration is fully utilized for power generation, thereby not only avoiding the trouble brought by the vibration, but also solving an energy source problem; the life of a bridge can be prolonged to a certain degree, and the device is energy-saving and environment-friendly and has large development space; and the whole device has simple structure, low cost and strong reliability.