The invention relates to the field of power generating equipment, and particularly relates to a road power generating device. The road power generating device comprises a pressure-bearing plate, a transmission, a rack wheel, a pinion, an electric generator and a reset mechanism, wherein one end of the transmission is connected with the pressure-bearing plate, the other end of the transmission is connected with the rack wheel, the rack wheel is meshed with the pinion, the pinion is connected with the electric generator, one end of the reset mechanism is connected with the pressure-bearing plate, and the other end of the reset mechanism is connected onto the ground. The road power generating device provided by the invention has a simple structure, when the pressure-bearing plate is pressed, the transmission drives the rack wheel to rotate, the pinion meshed with the rack wheel can also rotate at the same time, kinetic energy produced by the rotation of the pinion is transferred onto the electric generator, the electric generator can convert the kinetic energy into electric energy, since the tooth number of the pinion is small, the rotate speed of the pinion is relatively high, and the kinetic energy is greater, therefore, the converted electric energy is relatively high, and the conversion efficiency is high.