In　this　work,　a　UiO-66-diatomite　composite　was　synthesized　and　used　as　sorbent　to　sample　benzene,　toluene　and　xylene　(BTX)　in　indoor　air.　The　physicochemical　features　of　the　as-prepared　composite　were　deeply　characterized　by　X-ray　diffraction　(XRD),　scanning　electron　microscopy　(SEM),　thermo-gravimetric　analysis　(TGA)　and　nitrogen　adsorption-desorption　isotherm　analysis.　Moreover,　an　efficient　analysis　method　for　the　enriched　BTX　compounds　by　the　UiO-66-diatomite　composite　was　successfully　developed　using　thermal　desorption　(TD)GC-MS　technique.　The　influence　of　desorption　temperature　was　investigated　to　optimize　the　operation　conditions.　Under　the　desorption　temperature　of　180　?,　the　method　depicted　good　linearity　(R-2　＞　0.99)　in　the　range　of　5　ng　to　1000　ng　as　well　as　excellent　reproducibility　with　relative　standard　deviation　(RSD)　between　0.6%　and　3.5%,　in　which　the　satisfactory　recovery　was　achieved　from　75.2%　to　115%.　More　importantly,　the　developed　method　also　exhibited　high　sensitivity　with　the　method　detection　limit　(MDL)　in　the　range　of　0.04-0.09　mu　gm(-3).　Hence,　the　findings　evidence　that　this　method　might　be　one　of　the　promising　routes　to　detect　trace　levels　of　BTX　compounds　in　indoor　air　and　the　MOF-based　composite　is　feasible　to　be　used　as　sorbent　for　the　capture　of　volatile　organic　compounds　in　air.