Sealing element, multi-channel switching valve, thermal management system of vehicle and vehicle

The invention discloses a sealing piece, a multi-channel switching valve, a thermal management system of a vehicle and the vehicle, the sealing piece comprises a body and a plurality of sealing convex ribs, at least part of the sealing convex ribs are outer convex ribs, and the outer convex ribs are arranged on the outer edge of the body and extend in the circumferential direction of the body; wherein the outer convex ribs incline towards the center of the adjacent body, and the inclination angle of the outer convex ribs is not larger than 30 degrees. According to the sealing element provided by the embodiment of the invention, the outer convex ribs incline towards the center direction of the adjacent body, so that the body is convenient to demould in the production process, the outer convex ribs are prevented from being seriously deformed or deflected due to stress, and the sealing performance of the sealing element is ensured; and the inclination angle of the outer convex rib is not greater than 30 degrees,