Vehicle rear-end collision prevention device

The invention discloses a vehicle rear-end collision prevention device, and relates to the technical field of vehicles, the vehicle rear-end collision prevention device comprises an executing mechanism and a road condition recognition control system, the executing mechanism comprises a driving component, a one-way transmission component, a worm gear, a worm, an elastic component and a pull ring, and the elastic component and the pull ring are arranged at the two ends of the worm respectively; the end, away from the worm, of the elastic component is used for being fixed to an auxiliary frame, a strip-shaped hole is formed in the middle of the pull ring, the pull ring is used for being arranged outside one end of the brake pedal in a sleeving mode, and the pull ring is located above the brake pedal and used for driving the brake pedal to rotate relative to the pedal supporting rod. The driving component is used for being fixed to an auxiliary frame, the worm gear is connected with the driving component through