Building roof construction tool

The utility model discloses a building roof construction tool which comprises a frame, the inner side of the frame is respectively connected with a trowelling cylinder and a feeding cylinder through bearings, the front side of the feeding cylinder is provided with a cleaning cylinder, one end of the trowelling cylinder is fixedly connected with a first transmission wheel, and one end of the feeding cylinder is fixedly connected with a second transmission wheel. A cleaning brush is fixedly connected to the outer surface of the cleaning cylinder, a rotating wheel is fixedly connected to one end of the cleaning cylinder, a mounting frame is fixedly connected to the top of the frame, a material preparation hopper is fixedly connected to the top of the mounting frame, connecting shafts are fixedly connected to the front face and the back face of the material preparation hopper, and movable sleeves are movably connected to the outer sides of the connecting shafts; the outer side of the movable sleeve is fixedly con