This utility model discloses an automotive energy-absorbing device, a vehicle
body frame, and a vehicle. The automotive energy-absorbing device is installed between a
crash beam and a longitudinal beam, and includes a telescopic energy-absorbing box and a drive
assembly. One end of the telescopic energy-absorbing box is connected to the
crash beam, and the other end is connected to the drive
assembly. The end of the drive
assembly away from the telescopic energy-absorbing box is connected to the longitudinal beam. After receiving a
collision risk signal, the drive assembly controls the length of the telescopic energy-absorbing box in the longitudinal
beam direction. In this embodiment, when a collision between the vehicle and an obstacle is detected, the drive assembly controls the telescopic energy-absorbing box to lengthen in the longitudinal
beam direction. When the obstacle collides with the vehicle, the obstacle first contacts the
crash beam, causing the crash beam to deform. Then, the telescopic energy-absorbing box undergoes crush deformation. By increasing the deformation space of the vehicle when the obstacle collides with the vehicle, the risk of injury to the occupants during a high-speed collision is reduced.