Lightweight rear wall cabin door assembly of electric motor coach

The utility model discloses a light-weight rear wall cabin door assembly of an electric motor coach. A plurality of groove parts are arranged on the inner end surface of the inner framework; the bottom face of each groove part protrudes towards the outer end face of the inner framework to form a matched protruding face. A matching groove surface matched with the matching convex surface is arrangedon the inner end surface of the door plate; filling glue is applied to the inner end face of the door plate and the outer end face of the inner framework, the door plate and the inner framework are spliced with each other, the matching faces of the outer edges of the door plate and the inner framework are fixed through welding, two fixing grooves are symmetrically formed in the upper end of the inner framework, and the hinges are fixed in the fixing grooves through screws; and the sealing pieces are fixed around the door plate. The utility model has the advantages of high strength and reducedweight; and compared with