The invention relates to a dust removing system. A casing (4) having an air discharging chamber (2) and an air sucking chamber (3) is provided with a first jetting nozzle (11) and a second jetting nozzle (12) on the underside thereof. The first jetting nozzle (11) and the second jetting nozzle (12) blow supersonic jets such that these approach each other. A sucking nozzle (9) is located between the first jetting nozzle (11) and the second jetting nozzle (12) to allow the working air to be sucked into the casing (4). <IMAGE>
