The invention relates to a split charging workbench of a heavy-duty car, and belongs to the field of production equipment. The split charging workbench is composed of a platform main supporting column, a platform rotating shaft, a first platform supporting plate, second platform supporting plates, guard bars, balance shaft supports, drive axle supports, a worm wheel and a worm; the split charging workbench is characterized in that the platform main supporting column is horizontally placed, the worm and a worm support on the platform main supporting column are installed in a matched manner, the worm wheel and the worm are installed in a meshed manner, the platform rotating shaft is connected with the worm wheel through a shaft, and the platform rotating shaft and the worm wheel are concentrically assembled above the platform main supporting column; the first platform supporting plate is fixedly installed at the middle portion of the platform rotating shaft through bolt connection, the two second platform supporting plates are symmetrically placed on the two sides of the first platform supporting plate, and fixedly mounted through bolt connection; the four drive axle supports are located at the four corners and are fixedly installed through bolt connection, and the two balance shaft supports are symmetrically arranged and are fixedly installed through bolt connection; and the two guard bars are symmetrically placed and are in hole shaft fit with sliding grooves of the second platform supporting plates through sliding rods for stretching and movement. The workbench is simple in structure and less in using space.