Simulation load loading device of large chassis dynamometer

The invention discloses a simulation load loading device of a large chassis dynamometer. The simulation load loading device comprises a supporting seat, a sliding seat slidably mounted on the supporting seat, and a suspension seat arranged at the top of the sliding seat and suspended at the bottom of a frame, wherein a dragging wheel is arranged on the side face of the suspension seat. The simulation load loading device further comprises dragging belts and a dragging driving part, wherein the first ends of the dragging belts are fixed to the supporting seat; the second ends of the dragging belts bypass the dragging wheel in a one-to-one correspondence mode; and the dragging driving part is fixedly connected with the second ends of all the dragging belts and fixed to the supporting seat. The second ends of the dragging belts bypass the dragging wheel and then are connected with the dragging driving part, the dragging driving part is started, the dragging belts drag the dragging wheel inthe vertical direction,