The invention relates to a circular weaving machine with a dust removing device. The circular weaving machine comprises a circumferential bottom plate, a blower fan arranged on the bottom plate, a filter dust collector connected to one end of the blower fan, a blowpipe connected to the other end, and a dust blower movably connected to the blowpipe. The invention is characterized in that the dust blower includes a blast pipe connected to the blowpipe and a plurality of air nozzles uniformly distributed at the bottom of the blowpipe, the air nozzles at the two sides of the connection of the blowpipe and the blast pipe are arranged in the same direction or the opposite direction, the air nozzles are all in an alpha angle with the vertical direction, two ends of the blast pipe are closed type structures; or the dust blower includes the blast pipe connected to the blowpipe, and the blast pipe is in a reverse U shape, blow openings are opened in the bottom of the two ends of the blast pipe, and the blow openings of the two ends are all in a beta angle with the vertical direction, and an adjustable guiding blast pipe is arranged at the connection of the blowpipe and the fixed air nozzles. The invention has the advantages of convenient operation, good dust removing and cooling effect and low manufacturing cost.