Dust removal retaining wall structure of dry quenching furnace

The dust removal retaining wall structure comprises an air inlet channel and an air outlet channel, the top of the air inlet channel is connected with the top of the air outlet channel through an inclined transition structure, a plurality of first upper retaining walls are arranged at the bottom of the inclined transition structure at intervals, and the bottoms of the first upper retaining walls are arranged in a step shape. A dust collecting hopper is arranged below the first upper retaining wall, and a lower retaining wall is arranged at the position, located on the edge of the dust collecting hopper, in the air outlet channel. By adopting the structural design of variable cross section, the gas passing area of the gas inlet channel is larger than the gas channel area of the gas outlet channel, so that the gas can be ensured to have enough flow speed even if the gas is blocked and turned by a plurality of channels of gas, and a better dust removal effect is realized by matching with the retaining wall; acco