The utility model relates to a quick-mounting type pipeline plug, which is characterized in that the quick-mounting type pipeline plug consists of a connecting piece and a plug piece, the connecting piece is a pipe fitting with a T-shaped section, and a quick-mounting slotted hole for mounting the plug piece is arranged on the end surface of the pipe fitting; the plugging piece is composed of a plugging plate, an inserting groove, a sealing rubber mat, a fast-assembling connector and a handle. an inserting groove is formed in the pipe wall, corresponding to the pipeline, of the plugging plate;a sealing bulge is formed on the inner wall part of the inserting groove; a sealing rubber pad is arranged between the pipeline and the inserting groove; a cavity is formed in the position, oppositeto the connecting piece, of the blocking plate, a fast-assembly connector is installed at the cavity, the blocking piece blocks the pipeline by installing the fast-assembly connector on the blocking piece into the fast-assembly groove hole of the connecting piece, and the handle is installed at the outer side end of the blocking plate. The utility model has the advantages of scientific and reasonable design, convenience in installation, strong sealing performance, improved installation efficiency and easiness in realization.