Backdoor assembly for vehicle and vehicle with same

The utility model discloses a back door assembly for a vehicle and the vehicle with the back door assembly. The back door assembly comprises a back door outer plate assembly, the back door outer plate assembly comprises a back door outer plate body and a tail lamp mounting plate, the tail lamp mounting plate is fixedly connected with the back door outer plate body, and a tail lamp mounting structure is arranged on the tail lamp mounting plate; the back door inner plate assembly is located on the side, facing a passenger compartment of the vehicle, of the back door outer plate assembly; the interior trim protection plate is arranged on the side, away from the back door outer plate assembly, of the back door inner plate assembly, and the interior trim protection plate is fixed to the tail lamp mounting plate. According to the back door assembly for the vehicle, the interior trim protection plate is fixed on the tail lamp mounting plate, so that an additional inner plate reinforcing plate can be prevented from b