The invention discloses a vehicle driving early warning device. The vehicle driving early warning device comprises mounting cavities formed in two sides of the lower end of the tail portion of a vehicle, the mounting cavities are each internally and separately provided with a mounting plate, side plates arranged symmetrically, an energy absorbing layer, a first steel plate, a connecting piece, a hydraulic cylinder, a second steel plate, an extension spring, a compression spring mounting groove, a compression spring, an aluminum foam layer, foam cotton and a fender. The output ends of the hydraulic cylinders are extended out, the second steel plates are pushed out along the sliding grooves, the impact from the rear of the vehicle is effectively buffered by arranging the foam cotton, the impact is dispersed by arranging the aluminum foam layer, the second plate plays a role of shock absorption by arranging the compression springs, the pressure brought by the impact on the hydraulic cylinders is protected by arranging the extension springs, and the impact can be released by arranging the energy absorbing layers. The vehicle driving early warning device absorbs and releases the pressure through the arrangement of multiple buffer energy absorbing structures, and plays a protective role for a vehicle body.