The invention discloses a pipeline cleaning method. The pipeline cleaning method comprises the following steps that a protection layer easy to peel off is arranged on the inner wall of a pipeline; and after use of the pipeline meets preset conditions, the protection layer on the inner wall of the pipeline is shoveled, and to-be-removed accumulation attached to the protection layer is separated from the inner wall of the pipeline together. The protection layer easy to peel off is arranged on the inner wall of the pipeline, organic volatile matter is attached to the protection layer rather than directly attached to the inner wall of the pipeline, and the organic volatile matter is directly separated from the pipeline by shoveling the protection layer. The cleaning method is easy to operate, the accumulation of the organic volatile matter in the pipeline can be fast and effectively removed, meanwhile, damage to the pipeline in the cleaning process can be effectively reduced, and the service life of the pipeline can be prolonged.