The top cover outer plate comprises a top cover outer plate, and the front end and the rear end of the top cover outer plate are respectively welded and fixed on the vehicle body with the upper connecting plates of the front windshield assembly and the top cover rear cross beam;

The front end of the top cover outer plate is provided with at least two front positioning flanges with corresponding structures, the bottom of the front positioning flanges is integrally formed with the front end of the top cover outer plate, and the top extends away from the top cover outer plate;

The rear end of the top cover outer plate is provided with at least two rear positioning flanges with corresponding structures, the bottoms of the rear positioning flanges are integrally formed with the rear end of the top cover outer plate, and the tops of the rear positioning flanges extend away from the top cover outer plate.