Water supply and drainage anti-blocking device for constructional engineering

The utility model discloses a water supply and drainage anti-blocking device for constructional engineering, which comprises a main pipe body, branch pipe bodies are fixedly connected on the main pipe body, the branch pipe bodies are communicated with the main pipe body, and a first valve and a second valve are arranged between the main pipe body and the branch pipe bodies. The main pipe body is provided with a first valve and a second valve, the main pipe body is fixedly connected with a drain outlet between the first valve and the second valve, the main pipe body is internally and fixedly connected with a filter screen at one side, far away from water inlet, of the drain outlet, and the branch pipe body is provided with a third valve at one end, close to the water inlet, of the branch pipe body. Water flow is guided by the branch pipe bodies, the end covers and the connecting shafts are taken down by loosening bolts in the mounting holes, the main pipe body can be conveniently cleaned, the second valve is o