This invention discloses a pipeline cleaning device for filling machines, belonging to the field of pipeline cleaning technology. It solves the problem that in existing filling machines, residues easily solidify and clog material conveying hoses, filling valves, and filling nozzles during shutdown cleaning, resulting in low cleaning efficiency using conventional
cleaning methods. The device includes: a main body, an angle adjustment unit, and an adjustable cleaning mechanism. The adjustable cleaning mechanism includes: a hollow cleaning seat, a
drive motor installed at one end of the hollow cleaning seat, and a cleaning support tray. The cleaning support tray is detachably installed at the end of the hollow cleaning seat and is used to support the internal and external cleaning components. This invention features an adjustable cleaning mechanism, enabling thorough cleaning of both the inner and outer walls of the pipeline. Simultaneously, the internal and external cleaning components can heat the inside of the pipeline, thereby preventing the accumulation and blockage of solidified residues within the pipeline.