Trapezoid fastening and connecting structure of half-loading bus

The invention provides a trapezoid fastening and connecting structure of a half-loading bus. The trapezoid fastening and connecting structure comprises a bus body floor framework, a pair of chassis frame outward-extending beams and a pair of bus body lateral skirt standing columns, wherein the chassis frame outward-extending beams are disposed on two sides of the bus body floor framework, the chassis frame outward-extending beams and the bus body floor framework form a trapezoid structure, and each chassis frame outward-extending beam is sequentially provided with a first mounting hole, a second mounting hole and a third mounting hole along the length direction; the bus body lateral skirt standing columns are fixedly connected through a crossbeam, and the inner-side mounting face of each bus body lateral skirt standing column is has inclination matched with the corresponding chassis frame outward-extending beam and sequentially provided with a first embedded nut, a second embedded nut and a third embedded nut along the length direction. By the trapezoid structure of the chassis frame outward-extending beams and the bus body lateral skirt standing columns, the left and right gaps after fastening are eliminated, and manual measuring and adjusting of left and right sizes after fastening are not needed.