Reverse-flow sedimentation tank inclined pipe flushing system

The invention discloses a reverse-flow sedimentation tank inclined pipe flushing system, which comprises a sedimentation tank body. The sedimentation tank body is internally and sequentially providedwith a mud sinking area, an inclined pipe sedimentation area and a water collecting area from bottom to top, wherein the mud sinking area, the inclined pipe sedimentation area and the water collectingarea communicate; a flushing device is arranged in the water collecting area and comprises a supporting frame with the length being the same as the width of the sedimentation tank body; a cleaning main pipe is arranged on the lower part of the supporting frame; a plurality of sets of inverted U-shaped flushing pipes are arranged on the cleaning main pipe; small submersible pumps are arranged at one ends of the U-shaped flushing pipes, manual ball valves are arranged in the middle sections of the U-shaped flushing pipes, and the other ends of the U-shaped flushing pipes communicate with the cleaning main pipe; cleaning