The invention discloses a sharing assembly for a saucer and a handrail for a car. The sharing assembly comprises a handrail framework, a saucer and handrail integrated box and an integrated box supporting box; the handrail framework is a rectangular frame and comprises a U-shaped frame formed by bending a back transverse pipe and a steel pipe, a horizontal supporting plate is fixedly installed on the handrail framework, and the saucer and handrail integrated box and the integrated box supporting box are fixed above the horizontal supporting plate; a connecting plate is additionally arranged and used for connecting the U-shaped frame with the back transverse pipe; the whole integrated box supporting box is a dustpan-shaped box body, outwards-extending edges are arranged at the tops of the left side face, the right side face and the back side face of the box body, and longitudinally-extending strengthening ribs are arranged on the outer walls of the front ends of the left side face and the right side face; and the width of the upper ends of the strengthening ribs is smaller than the width of the edges, and the widths of the strengthening ribs are gradually decreased from top to bottom until the width value is zero. The weight is greatly reduced, the process structure is simplified, and the manufacturing cost is reduced; the strength at the positions of the two sides of an opening part of the integrated box supporting box is improved, and line generation caused by too large tension during face glue pulling is avoided.