The utility model relates to a pipe filter, and in particular relates to a filter bag framework of a pipe filter. The framework is formed by welding a suspension ring, a closure plate, a quick coupling, a circular pipe, a flange, a square pipe, a titanium wire and a base plate, wherein the square pipe is welded at the lower part of the flange, and is provided with overflow holes formed in four side faces; the titanium wire is wound and welded on the square pipe in a spiral manner; the base plate is welded at the lower part of the square pipe, and overflow holes are processed in the base plate; the circular pipe is welded at the upper part of the flange, and the quick coupling is welded on the circular pipe; and the closure plate is welded at the upper part of the circular pipe, and the suspension ring is welded on the closure plate. The filter bag framework of the pipe filter has the beneficial effects that such a filter bag framework is high in filter efficiency, long in service life, simple in structure, and convenient to manufacture and maintain.