With　dibutyl　phthalate　(DBP)　as　the　sole　carbon　source,　we　isolated　a　DBP-degrading　strain;　by　its　morphology　as　well　as　16S　rDNA　sequencing　and　phylogenetic　analysis,　the　strain　was　identified　as　Stenotrophomonas　sp.,　designated　as　strain　B3.　Degradation　of　Phthalate　esters　(PAEs)　by　Stenotrophomonas　was　reported　for　the　first　time.　The　degradation　efficiency　of　0.05　g•L-1　DBP　is　93.4%;　B3　could　efficiently　degrade　DBP　up　to　50　g•L-1,and　under　the　conditions　of　pH　8,　35　,　the　degradation　efficiency　of　10　g•L-1　DBP　by　B3　reached　95.8%.　Kinetic　studies　showed　that　DBP　degradation　by　B3　followed　first-order　kinetics,　and　the　initial　degradation　rate　of　50　g•L-1　DBP　can　reach　1.25　g•L-1•h-1.　The　degradation　efficiencies　of　four　other　common　PAEs(di-2-ethylhexylPhthalate,dimethyl　phthalate,benzyl　butyl　phthalate,diethyl　phthalate)as　well　as　aniline,　toluene　and　phthalic　acid　by　B3　were　50%　or　higher,　suggesting　that　B3　had　a　broad　substrate　spectrum.　The　ability　of　B3　to　degrade　various　PAEs　at　high　concentrations　indicates　that　B3　is　promising　in　bioremediation　of　PAEs.　©　2018,　Editorial　Department　of　Journal　of　Tongji　University.　All　right　reserved.