The　demand　for　cost-effective,　easy-handling,　and　recyclable　adsorbents　with　high　performance　for　removal　of　organic　dyes　is　gaining　prominence.　Although　polypyrrole　(PPy)　has　proven　to　be　promising　for　adsorption　of　anionic　azo　dyes　(AADs),　the　use　of　PPy-based　particles　and　fibers　still　faces　limitations　such　as　challenging　separation　and　undesirable　mass　transfer.　In　this　work,　a　superhydrophilic　polypyrrole　nanofiber　mat　(PPy　NFM)　with　a　3D　fluffy　porous　structure　was　developed　via　in　situ　polymerization　of　pyrrole　monomers　with　electrospun　PAN@PVP　NFM　as　the　substrate　and　followed　by　freeze-drying.　The　3D　PPy　NFM　exhibited　a　fast　adsorption　rate　(within　3　h)　and　high　adsorption　capacity　(up　to　234.62　mg　g(-1))　towards　AADs,　remarkably　superior　to　those　of　2D　lamellar　PPy　NFM.　After　five　times　of　reuse,　the　reduction　of　adsorption　capacities　for　AADs　was　less　than　10%.　Another　striking　advantage　of　the　3D　PPy　NFM　lies　in　the　integration　of　dispersibility　and　integrity,　making　it　easy　to　use　and　recycle　without　centrifugation　or　filtration.　Moreover,　the　adsorption　behaviors　of　three　dye　models,　Metanil　Yellow　(MY),　Acid　Orange　7　(AO7),　and　Acid　Yellow　9　(AY9),　were　thoroughly　discussed,　suggesting　that　the　adsorption　of　AADs　by　the　PPy　NFM　involves　multiple　mechanisms,　including　electrostatic　attraction,　pi-pi　interaction　and　hydrogen　bonding,　thus　ensuring　high　adsorption　efficiency.　These　attractive　characteristics　make　3D　PPy　NFM　be　a　potential　eco-friendly　adsorbent　in　dye　wastewater　treatment.