Pipeline flange plugging device

The utility model belongs to the technical field of pipeline construction, and particularly relates to a pipeline flange plugging device which comprises a fixing disc, one side of the fixing disc is provided with a connecting disc, one side of the connecting disc is fixedly connected with a connecting rod, the fixing disc is provided with a first connecting hole matched with the connecting rod, one end of the connecting rod is fixedly connected with a limiting plate, and the limiting plate is fixedly connected with the connecting disc. A fixing plate is fixedly connected to the outer wall of the fixing ring, an inner receding hole matched with the fixing ring is formed in the fixing plate, a rotating plate is rotationally connected to one side of the fixing plate, and an outer receding hole matched with the inner receding hole is formed in the rotating plate; a first connecting hole, a limiting plate and a connecting rod form an assembly for rapidly positioning a fixed disc and a connecting disc, so that the