The invention discloses a motor vehicle protection device. The motor vehicle protection device comprises a first rod body and a fixed body, wherein the two ends of the fixed body are connected with the bottom of a motorcar and the first rod body respectively. The motor vehicle protection device is characterized in that a buffering piece is filled or pre-buried into the first rod body and is a PU workpiece; the section of the first rod body is of a hollow circular or square pipe structure; end covers are arranged at the two ends of the first rod body respectively and are connected with the first rod body in a sleeved mode; the first rod body is in the shape of a bar or an arc or U; a pedal part is arranged on the upper middle portion of the first rod body and is a PU workpiece. The motor vehicle protection device is simple in structure, low in production cost, high in protection performance and good in using effect.