The purpose of the present invention is to solve the problem that the existing high-rise building sewage pipe is blocked and difficult to dredge, and discloses a high-rise building sewage pipe, including sewage pipe, barb, rotating shaft, barb, slider, chute, blade, filter Net, first scraper, top block, control box, return spring, connecting block, second scraper, connecting block, second scraper, connecting rod, sealing ring, sewage cover, bearing, motor, first coil spring, The first contact block, the second contact block, and the second coil spring. The advantage of the present invention is that by setting the filter net, the garbage can be intercepted in one place, so that the sewage pipe behind is unblocked; by setting barbs and barbs, the entangled garbage such as hair can be intercepted; All the intercepted garbage is smashed and discharged. By setting the return spring and the contact block, the rotation of the motor can be automatically controlled, so that the blocked garbage can be smashed to clear the water pipe, which is convenient and quick, saving time, effort and money.