Anti-blocking device for building water supply and drainage

The utility model discloses an anti-blocking device for building water supply and drainage, which relates to the technical field of water supply and drainage, and adopts the technical scheme that the anti-blocking device comprises a pipeline, a top cover is movably mounted at the top of the pipeline, a collecting net is movably mounted at the upper end in the pipeline, and a handle is movably mounted at the upper end of the collecting net. The anti-blocking device has the advantages that the collecting net, the handle, the top cover and the like are arranged, so that the purpose of good anti-blocking effect is achieved, falling hair flows into a sewer along with sewage during bathing, the hair flows into the collecting net at the moment, and when a large amount of hair is concentrated at the bottom of the collecting net, the hair flows into the collecting net. When the interior of the collecting net is cleaned, a spring is compressed while a front hinge plate and a rear hinge plate rotate downwards, and when