The invention discloses an automobile rear anti-collision beam assembly and further discloses an automobile adopting the automobile rear anti-collision beam assembly. The automobile rear anti-collision beam assembly comprises a rear anti-collision beam outer plate which is in a long-strip shape with the two ends being open. The section of the rear anti-collision beam outer plate is in a U shape, and the rear anti-collision beam outer plate is provided with the first end and the second end which are oppositely arranged and each provided with a rear anti-collision beam inner plate, a rear anti-collision beam energy absorption box and a rear anti-collision beam mounting plate. The rear anti-collision beam inner plates are mounted in a U-shaped cavity of the rear anti-collision beam outer plate and mounted between the rear anti-collision beam outer plate and the rear anti-collision beam energy absorption boxes. The rear anti-collision beam energy absorption boxes are mounted between the rear anti-collision beam mounting plates and the rear anti-collision beam inner plates. The second ends are each provided with a tow hook threaded pipe, and the tow hook threaded pipes are connected with the rear anti-collision beam outer plate and the rear anti-collision beam inner plates located at the second end correspondingly. The problems that the structure is complex, the anti-collision effect is common, and the using function is simplex can be solved.