Pipeline plugging pressure testing device convenient to disassemble and assemble

The utility model relates to a pipeline plugging and pressure testing device convenient to disassemble and assemble, which is provided with two semicircular clamping rings, semicircular grooves are arranged in the clamping rings, and two side walls of the grooves are provided with slopes inclining from inside to outside; connecting and fixing pieces convenient to connect and fix are arranged at two butt-joint ends of the whole ring formed by the two semicircular clamping rings; in addition, two circular plugging discs are arranged, each plugging disc is in a circular arc shape, the inner portion of each plugging disc is concave, the outer portion of each plugging disc is provided with a protruding edge protruding outwards, and the outer side face of each protruding edge is provided with an inward inclination, namely the outermost edge is slightly thin. A pressure test hole and a nut for sealing the hole are arranged on the disc surface of each plugging disc; a sealing ring is arranged on the inner side of the