Top cover beam assembly of high-top cab of commercial vehicle and high-top cab of commercial vehicle

The invention relates to a top cover beam assembly of a high-top cab of a commercial vehicle and the high-top cab of the commercial vehicle, and the top cover beam assembly of the high-top cab of the commercial vehicle comprises a skylight frame body which is of a rectangular frame structure formed by integrally punching a steel plate, and a rectangular skylight hole is formed in the skylight frame body; the bracket beam comprises framework longitudinal beams located at the front end and the rear end of the skylight frame body respectively and framework transverse beams located on the left side and the right side of the skylight frame body respectively. And the reinforcing plate comprises an upper reinforcing plate and a lower reinforcing plate which are used for fixing the framework longitudinal beams and the framework cross beams on the skylight frame body. A skylight frame body of the top cover beam assembly of the high-top cab of the commercial vehicle is of a rectangular frame structure formed by integra