Auxiliary device for cleaning sundries in large-diameter pipeline

The utility model provides an auxiliary device for cleaning sundries in a large-diameter pipeline. The auxiliary device comprises a box body, a supporting column, a backup plate, an illuminating lamp, a cleaning disc, an arc-shaped shovel, a driving wheel and a driven wheel, the box body of the device can bear a worker, so that the cleaning work of the worker is changed from a stooping state to a sitting posture state, meanwhile, the illuminating lamp provides a light source, and meanwhile, equipment is placed in the tool bin and the slag storage bin, so that health injury caused by long-term stooping operation of carrying the equipment is fundamentally eradicated; the two additionally-arranged cleaning discs completely clean slag from the outer side to the center of the pipe bottom, then the arc-shaped shovel completely shovels the slag in the center of the pipe bottom, along with increase of the slag on the arc-shaped shovel, the slag is gradually pushed into the slag storage hopper to be stored, and the cl