Building machinery cleaning device

The utility model discloses a building machinery cleaning device which comprises a box body, a water tank installation cavity is formed in the upper portion of the right side of the box body, a water tank is installed in the water tank installation cavity, a motor installation cavity is formed in the lower portion of the right side of the box body, and a motor is installed in the motor installation cavity. A motor shaft at the top of the motor is connected with a driving gear, a plurality of longitudinal rotating shafts are installed on the inner side of the water tank, the bottoms of the rotating shafts are connected with a driven gear meshed with the driving gear, a plurality of cleaning brushes are evenly distributed on the outer sides of the rotating shafts, and an electrical part installation cavity is formed in the upper portion of the left side of the box body. A control circuit board and a rechargeable battery electrically connected with the control circuit board are installed in the electrical part i