Automatic dust-removal paint spraying device for inner wall of pipeline

The invention discloses an automatic rust-removal paint spraying device for an inner wall of a pipeline. The automatic rust-removal paint spraying device mainly comprises a rust removal device, a power device and a paint spraying device, wherein the rust removal device is fixedly connected with the power device through a universal coupler, the paint spraying device is movably connected with the power device through a hook and a hinge seat, a tension spring of the rust removal device is installed in a clamping groove of a fixed panel, a tension shaft is installed on the fixed panel through a slide bolt, a storage battery and a driving motor are sequentially installed on a soleplate of the power device, a worm is connected with the driving motor through a coupler, a worm gear is installed on a driving front shaft, and a rust absorption felt ring is arranged on the outer ring of a barrel of the paint spraying device in a sleeved manner. By integrating multiple functions, the automatic rust-removal paint spraying