Conveying device suitable for backfilling and discharging of narrow ultra-deep foundation trench

The invention discloses a conveying device suitable for backfilling and discharging of a narrow ultra-deep foundation trench. The conveying device comprises a movable bracket, a movable receiving hopper, a slidable discharging hopper and a cylindrical retractable discharging belt, wherein the movable bracket comprises a bracket body and roller supporting legs with limiting devices; the movable receiving hopper is fixedly connected to the bracket body; the slidable discharging hopper is slidably connected to a discharging opening of the movable receiving hopper, the discharging opening of the movable receiving hopper defines a long-strip-shaped sliding groove, an inlet in the upper end of the slidable discharging hopper communicates with the interior of the movable receiving hopper through the discharging opening, sealing baffles are arranged on the two sides of the inlet in the upper end of the slidable discharging hopper and slidably arranged in the sliding groove, and the sealing baffles block the sliding g