Collision energy-absorbing security device of motor vehicle

The utility model relates to a motor vehicle collision energy absorbing safety device which comprises an elastic shell, at least a first elastic assembly and a second elastic assembly which are arranged in the elastic shell. The elastic shell comprises a first elastic face and a second elastic face arranged opposite to the first elastic face. Magnetic blocks are arranged at both ends of the first elastic assembly and the second elastic assembly and are respectively fixed on the first elastic face and the second elastic face, with the identical poles arranged opposite to each other; and springs are arranged between the identical poles. The magnetic block of the first elastic assembly, which is fixed on the first elastic face is also connected with a connecting rod; and the other end of the connecting rod is connected with a magnet block which threads out of the second elastic face and is disposed in a brake control coil. The motor vehicle collision energy absorbing safety device is unique in design and good in