High-bearing-capacity supporting device of automobile boarding pedal

The utility model discloses a high bearing capacity support device of an automobile boarding pedal, which comprises a primary fixing piece, a secondary fixing piece, an I-shaped piece, an external connecting piece and a pedal body, the secondary fixing piece is arranged on one side of the primary fixing piece, the I-shaped piece is arranged between the primary fixing piece and the secondary fixing piece, fixing holes are arranged on four sides of the outside of the I-shaped piece, and the external connecting piece is arranged on the external connecting piece. The first-level fixing piece and the second-level fixing piece are fixedly connected through an I-shaped piece, guide rails are arranged on the outer surfaces of the center positions of the first-level fixing piece and the second-level fixing piece, the length of the guide rails is smaller than that of the first-level fixing piece, and the first-level fixing piece and the second-level fixing piece are the same in length, width and height. The pedal bodie