Polybrominated　diphenyl　ethers　(PBDEs),　known　as　the　most　widely　used　brominated　flame　retardant,　have　received　great　public　concern　due　to　its　hidden　environment　and　health　problems.　Development　of　highly　selective　and　sensitive　analytical　approaches　for　enrichment　and　detection　of　ultratrace　PBDEs　are　in　high　demand.　Conventional　sample　pretreatment　techniques　usually　require　tedious　procedures,　long　time,　and　excessive　consumption　of　solvent　and　sample,　thus　hindering　ultrasensitive　detection　of　PBDEs.　To　address　this　issue,　we　first　reported　a　simple　room-temperature　approach　for　synthesis　of　tubular　magnetic　fluorinated　covalent　organic　frameworks　(MCNT@TAPB-TFTA).　The　introduction　of　fluorine　atoms　played　multiple　roles　in　improving　the　frameworks＇　hydrophobicity　and　the　adsorption　capabilities　for　PBDEs.　Combined　with　atmospheric　pressure　gas　chromatography-tandem　mass　spectrometry　(APGC-MS/MS),　several　crucial　parameters　of　magnetic　solid-phase　extraction　(MSPE)　including　adsorbent　dosage,　adsorption　time,　pH,　ion　strength,　the　eluent,　elution　time　and　elution　frequencies　were　examined　in　detail.　The　optimal　method　exhibited　wide　linear　ranges　(0.01–500　ng/L),　low　limit　of　detections　(LODs,　0.0045–0.018　ng/L),　good　correlation　coefficients　(r　≥　0.9977),　and　high　enrichment　factors　(EFs,　1425–1886　folds)　for　eight　PBDEs.　Furthermore,　this　proposed　method　could　be　successfully　applied　to　sensitive　determination　of　ultratrace　PBDEs　in　environmental　samples,　demonstrating　the　promising　potential　of　the　MCNT@TPAB-TFTA　as　an　adsorbent　in　sample　pretreatment.　©　2020　Elsevier　B.V.