Ash receiving hopper for exterior wall painting

The utility model relates to a dust receiving hopper for exterior wall painting, which aims at solving the technical problem that mortar in the dust receiving hopper is inconvenient to clean and recycle at present, and comprises a dust receiving hopper body and a second adjusting pipe, a first adjusting pipe is vertically and fixedly arranged at the bottom end of the dust receiving hopper body, and the first adjusting pipe is connected with the second adjusting pipe in a sliding mode. According to the dust receiving hopper, the first adjusting pipe is connected with the second adjusting pipe in a sliding mode, the use height of the dust receiving hopper body can be conveniently adjusted, the screw rod can be rotated to drive the limiting block to move left and right in the shell, and therefore the dust receiving hopper is convenient to use. When the limiting block pushes the convex teeth to move out of the shell to be meshed with the rack on the outer side of the first adjusting pipe, the first adjusting pipe