Pipeline cutting auxiliary device

The utility model relates to a pipeline cutting auxiliary device. The pipeline cutting auxiliary device comprises a hoop, the hoop comprises a fixed hoop body, a movable hoop body, a fixed ring and asliding ring, a tool installation base is arranged on the sliding ring, the sliding ring is assembled on the fixed ring in a guiding mode around the axis of the fixed ring, and pipeline receding openings are formed in the fixed ring and the sliding ring. The pipeline cutting auxiliary device can be installed on the outer circumferential face of a to-be-cut pipeline from the radial direction of theto-be-cut pipeline in a clasping mode. When the sliding ring rotates relative to the fixed ring; the sliding ring is always matched with the fixed ring; the cutting nozzle is fixed on the sliding ring through a tool mounting seat; by means of the pipeline cutting auxiliary device, circumferential movement of the cutting nozzle around the to-be-cut pipeline can be achieved, the cutting nozzle canmachine any position of the