The invention discloses a pipeline inner wall 
rust removal device, belonging to the technical field of 
polishing units. The device comprises a first end cover and a second end cover which are hermetically installed at two ends of the pipeline, a 
rust removal trolley is arranged in the pipeline, the dust removal trolley comprises a 
pneumatic motor with dual output shafts, a shell of the 
pneumatic motor is provided with a plurality of support shafts, the end part of each support shaft is provided with a roller wheel, a 
grinding disc is fixedly installed on the output shaft of the 
pneumatic motor, close to the first end cover, and is provided with a plurality of support rods in the radial direction, the end part of each support rod is provided with an 
abrasive disc, the output shaft of the pneumatic motor, close to the second end cover, is connected with a shot-
blasting machine in a transmission manner; the end part of the 
grinding disc is connected with a traction 
rope, the traction 
rope extends out of the first end cover, one end of the shot-
blasting machine, close to the second end cover, is connected with a shot feeding 
pipe, the pneumatic motor is connected with a gas inlet 
pipe, the shot feeding 
pipe and the gas inlet pipe extend out of the second end cover. The pipeline inner wall 
rust removal device can be used for solving the technical problems that the pipeline inner wall is serious in rust removal 
pollution and the rust removal effect is poor, and can be widely applied to pipeline cleaning.