The invention discloses a segmented dye pretreatment pipe for printing and dyeing, which includes a water inlet pipe, a fiber retention pipe 1 is installed on one side of the water inlet pipe, and the fiber retention pipe 1 includes an upper pipe shell and a lower pipe shell , when the segmented dye pretreatment pipe for printing and dyeing is passed into waste water, the retaining plate in the fiber retaining pipe 1 will float, and the arc-shaped end of the retaining plate will block the filamentous fibers, and the retaining nets on both sides will It will also intercept filamentary fibers, greatly improving the interception effect, and when no more waste water is passed through, the interception plate will turn over through the rotating shaft, and due to gravity, it will be in an upright state downwards, avoiding the shaking of filamentous fibers, greatly improving It is convenient to take out the filamentary fiber. When the waste water passes through the fiber retaining pipe 2, the velvet-like fiber material will be intercepted by the hook block, and when the water pressure drops, the velvet-like fiber material will be blocked by the curved point on the cross hook. Hook to hook and avoid disengagement.