The utility model relates to the technical field of pipeline inner wall cleaning and maintenance, in particular to an automatic
rust and dust removal paint spraying device for a pipeline, which comprises the pipeline and a
winch, a steel
wire rope is wound on the
winch, a cylindrical
barrel is arranged in the pipeline, and the
tail end of the steel
wire rope is fixed with the front end of the
barrel. A
rust removal mechanism, a dust removal mechanism and a paint spraying mechanism are arranged on the
barrel; the
rust removal mechanism comprises a rust removal driving
assembly and a rust removal
brush; the dust removal mechanism comprises a
dust collector, a dust collection opening and a dust collection
pipe; the paint spraying mechanism comprises a paint pressure storage box, a main oil conveying
pipe, an annular oil conveying
pipe, a connecting piece, a paint spraying head, a paint brushing driving
assembly and a paint rolling
brush. The problems that according to an existing method for conducting rust removal, dust removal and paint spraying on the pipeline through manual operation, construction is inconvenient, rust removal and paint spraying are not uniform or even missed, the construction period is long, and the hidden danger of
water leakage of the pipeline exists are solved.