Automatic stair-climbing cleaning robot

The utility model discloses an automatic stair-climbing cleaning robot, which belongs to the field of high-rise building cleaning and comprises an upper machine body and extension plates, the upper machine body is arranged above a lower machine body, the extension plates are symmetrically arranged at the top of the upper machine body, a rolling brush is mounted between the two extension plates through a bearing, splash-proof plates are arranged on the surfaces of the front sides of the extension plates, and the splash-proof plates are arranged on the lower side of the upper machine body. Wherein a motor A is arranged on the outer side of one extending plate, the output shaft end of the motor A is coaxially connected with the rolling brush, a connecting plate is arranged at the bottom of the upper machine body, a rack is embedded in the surface of the front side of the connecting plate, a limiting sliding groove is formed in the lower machine body, and the bottom of the connecting plate slides in the limiting