Drainage pipeline with sound insulation structure

The utility model discloses a drainage pipeline with a sound insulation structure, which comprises a drainage pipeline body, a support is arranged at the bottom of the drainage pipeline body, a placing seat is mounted at the top end in the support and positioned below the drainage pipeline body, and a heat-resistant pipe is sleeved outside a sound insulation pipe. According to the drainage pipeline with the sound insulation structure, the sound insulation cotton, the sound insulation pipe, the connecting bolt and the heat-resisting pipe are arranged, the sound insulation pipe and the heat-resisting pipe form a double-layer structure outside the drainage pipeline body, and the sound insulation cotton is assembled between the sound insulation pipe and the heat-resisting pipe, so that water in the drainage pipeline body flows to generate vibration during drainage; the sound insulation cotton is composed of a plurality of fiber holes, and after sound brought by vibration is subjected to countless reflection, mutu