In　this　study,　UiO-66　was　selected　as　sorbent　media　packed　in　the　tube　to　selectively　enrich　trace　levels　of　benzene　homologues　such　as　benzene,　toluene,　and　xylene　(BTX)　in　ambient　air　prior　to　thermal　desorption　(TD)-GC-MS　determination.　A　series　of　experiments　were　conducted　to　obtain　the　optimal　TD　conditions.　The　results　indicated　that　the　optimal　TD　parameters　were　as　follows:　desorption　temperature　of　180　degrees　C,　desorption　flow　rate　of　50　mL　min(-1),　and　desorption　time　of　30　min.　Furthermore,　the　method　based　on　UiO-66　enrichment　integrated　with　TD-GC-MS　for　trace　levels　of　BTX　was　successfully　developed.　It　exhibited　a　good　linearity　(R-2　＞　0.99)　in　the　range　of　50-1000　ng,　except　for　p,　m-xylene　in　the　range　of　100-2000　ng,　and　achieved　the　recovery　of　69.4-101.3%,　and　the　relative　standard　deviation　of　3.8-6.4%.　The　detection　limits　of　BTX　were　1.6-4.0　ng;　according　to　10　L　of　sampling　volume,　the　method　detection　limits　would　be　in　the　range　of　0.16-0.40　mu　g　m(-3).　Additionally,　the　method　was　successfully　applied　to　determine　BTX　in　indoor　air　and　showed　good　selectivity　and　sensitivity.　In　summary,　the　findings　in　this　work　revealed　that　UiO-66　was　an　attractive　adsorbent　for　selective　enrichment　trace　levels　of　BTX　compounds　in　ambient　air,　which　was　favorable　for　the　subsequent　detection　by　TD-GC-MS.