Waste collecting device for constructional engineering

The utility model discloses a waste collecting device for constructional engineering, which comprises an L-shaped shell and a dust removal mechanism, a waste collecting cabin is further arranged inside the L-shaped shell, an inclined feed port is arranged on one side of the upper end of the L-shaped shell, the dust removal mechanism comprises a U-shaped dust hood surrounding the edges of the two sides and the edge of the upper end of the feed port, and the U-shaped dust hood is connected with the L-shaped shell. Dust collection holes which are evenly distributed are formed in the inner side, facing the feeding port, of the U-shaped dust collection cover, the dust collection pipe can generate strong negative pressure on a cavity in the U-shaped dust collection cover under suction of the air blower, the negative pressure in the cavity can generate strong suction force on external air through the dust collection holes, and therefore raised dust drifting above the feeding port and on the inner side of the U-shape