Described is an automatic cleaning machine for swimming pools comprising a body with at least two motorized wheels for moving on a drive surface, at least one suction inlet positioned on a lower surface of the body, at least one outlet mouth, at least one turbine, operating between the suction inlet and the outlet mouth, controllable by a respective electricity supply battery, an electronic control unit for operating the wheels and moving the cleaning machine along the drive surface and for operating the turbine for exerting a thrust able to keep the body in contact with the surface. The automatic cleaning machine also comprises at least one chopping element interposed between the suction inlet and the outlet mouth.