Postprocessor hoop with double-hoop structure

The utility model discloses a postprocessor hoop of a double-hoop structure. Hoop base, the hoop base is provided with two arc-shaped supporting parts which are adjacently arranged in the length direction. Pins penetrating through the hoop base in the width direction are arranged at the two ends of any arc-shaped supporting part, a hoop belt forming a ring shape with the arc-shaped supporting partis arranged above the arc-shaped supporting part, the two ends of the hoop belt are arranged on the pins in a sleeving mode, and an adjusting device for adjusting the tightness of the hoop belt is arranged at the top of the hoop belt. The lower portion of the hoop base is bent outwards to form an installation base plate, and a plurality of reinforcing rib plates are arranged between the hoop baseand the installation base plate. One end of the hoop base is flush with one end of the installation base plate, and the other end of the hoop base extends upwards in an arc shape relative to the installation base plate. The u