The utility model provides a pipeline noise reduction device and a pipeline, the pipeline noise reduction device comprises a first sound absorption cotton layer attached to the outer side of the pipeline and a sound absorption plate arranged on the outer side of the first sound absorption cotton layer in a sleeving mode, a plurality of sound absorption holes are formed in the sound absorption plate, and the diameter of each sound absorption hole is smaller than or equal to 1.0 mm. According to the utility model, the influence of low-frequency noise and high-frequency noise in the pipeline on the surrounding environment can be weakened simultaneously.