The invention discloses a load-bearing plane conveying device, which is composed of driving rollers, bearing seats, conveyor belts, graphite gaskets, pallets, brackets, brackets, racks, driven rollers, reduction motors and transmission chains , the driving roller is installed on the left side of the frame, the driven roller is installed on the right side of the frame, the geared motor installed in the middle of the left side of the frame drives the driving roller and the conveyor belt forward through the transmission chain, and the graphite gasket under the conveyor belt , the supporting plate and the bracket are connected together, the graphite gasket is supported by the supporting plate, and the bracket is installed on the frame through the bracket. The present invention designs the load-bearing structure according to the lubricating characteristics, horizontal heat conduction characteristics and transfer characteristics of graphite. The graphite gasket supports the conveyor belt for load-bearing and plays a lubricating role in the relative friction movement. Due to the transfer characteristics of graphite, the graphite will move from The graphite gasket is transferred to the conveyor belt to achieve self-lubrication and reduce the friction coefficient.