Foreign matter prevention device for wireless positioner

The utility model discloses a foreign matter prevention device for a wireless positioner, which belongs to the technical field of wireless positioners and comprises the wireless positioner, a detachable rotating shaft is fixedly arranged on the upper surface of the wireless positioner, a support column is fixedly connected to an inner ring of the detachable rotating shaft, a first cylinder frame is fixedly connected to the top end of the support column, and second cylinder frames are inserted into two ends of the first cylinder frame. A third barrel frame is inserted between the other ends of the two second barrel frames, short rolling brushes are arranged outside the first barrel frame and the third barrel frame in a sleeving mode, long rolling brushes are arranged outside the positions, close to the left side and the right side of the wireless positioner, of the second barrel frames in a sleeving mode, short rolling brushes are arranged on the outer walls of the upper ends and the lower ends of the second b