Pretreatment device for pipeline corrosion prevention

The utility model relates to the technical field of pipeline corrosion prevention, in particular to a pretreatment device for pipeline corrosion prevention, which comprises a frame, a cleaning top plate is slidably connected to the lower side of the frame, and two cleaning cylinders are symmetrically arranged at the bottom of the cleaning top plate. The upper end of the cleaning belt is wound on the outer side of the cleaning roller through the two guide openings of the cleaning frame by means of opposite twisting rotation of the cleaning roller and the auxiliary roller, so that a pipeline is pushed to move, the cleaning belt can conduct cleaning treatment on the outer portion of the pipeline in a spiral mode, and then a straight pipe can be pretreated and cleaned; according to the cleaning device, a bent pipe with a radian can be pretreated and cleaned, a cleaning belt wound around the outer portion of the pipeline can be jacked through a jacking roller on a cleaning jacking plate, then the situation that th