Leakproofness testing device for water supply pipeline

The utility model relates to the technical field of water supply pipe leakproofness testing, and discloses a leakproofness testing device for a water supply pipeline, which comprises a placing plate, a supporting rod is fixedly connected to the middle of the left side of the upper surface of the placing plate, a threaded rod is arranged at the top of the supporting rod, and a placing disc is fixedly connected to the top of the threaded rod. A fixing mechanism is arranged on the right side of the outer surface of the threaded rod and comprises a sliding block, the sliding block is arranged above the outer surface of the threaded rod, a through hole is formed in the middle of the upper surface of the sliding block, and a rotating shaft is arranged on the right side of the sliding block. According to the leakproofness testing device for the water supply pipeline, clamping plates are arranged on the right side of a fixing block, the clamping plates can rotate through a rotating shaft, the two clamping plates corr