Vehicular rear collision preventing device

The utility model relates to the field of safe driving of motor vehicles, and discloses a vehicular rear collision preventing device. The vehicular rear collision preventing device is characterized in that the vehicular rear collision preventing device comprises a single chip microcomputer (SCM), and a vehicular front radar, a vehicular back radar, a buzzer and a display screen which are respectively electrically connected with the SCM, wherein the vehicular front radar is mounted at the front part of an own vehicle and used for collecting the relative distance, the relative vehicle speed and the relative angle of a front vehicle and the own vehicle; the vehicular back radar is mounted at the back part of the own vehicle and used for collecting the relative distance, the relative vehicle speed and the relative angle of a back vehicle and the own vehicle; the buzzer is mounted in a cab of the own vehicle and used for presenting an alarm prompt of the own vehicle; the display screen is mounted at the vehicle ta