Top cover outer plate, connecting structure of top cover outer plate and side wall outer plate and vehicle

The invention discloses a top cover outer plate, a connecting structure of the top cover outer plate and a side wall outer plate and a vehicle, and relates to the technical field of vehicles, the top cover outer plate comprises a top cover main body, the top cover main body is bent downwards in sequence to form a first flanging part and a second flanging part, and the first flanging part and the second flanging part are arranged on the top cover main body; a round corner is formed at the joint of the top cover body and the first flanging part and used for being welded to a side wall outer plate to form a lap joint part. In the technical scheme of the embodiment of the invention, through the arrangement of the first flanging part and the second flanging part, the transfer of heat to the top cover main body can be reduced, meanwhile, the top cover main body can be reinforced, in the welding process, the top cover outer plate is not easy to deform, and the top cover outer plate does not need to be set to be very