Constructional engineering water supply and drainage pipe anti-seepage device

The utility model provides an anti-seepage device for a water supply and drainage pipe in constructional engineering, relates to the technical field of water supply and drainage anti-seepage, and solves the problems that most of existing water supply and drainage anti-seepage methods use cement mortar to pour gaps, and the cement mortar is prone to incomplete pouring to cause seepage and difficultto maintain in the later period in the pouring process. If irrigation is not thorough, accidental disasters such as pipeline leakage and breakage can be caused; due to the fact that the first positioning supporting mechanism is arranged, the arranged first positioning ring can rapidly rotate through the first positioning shaft so as to conduct wrapping operation on the water supply and drainage pipeline, and therefore the pipeline can be better fixed and subjected to anti-seepage operation. And after the first fixing blocks arranged at the top ends of the two first positioning rings are aligned, the first fixing bloc