Ionic　liquid-based　dispersive　liquid-liquid　micro-extraction　(IL-DLLME)　was　coupled　with　high-performance　liquid　chromatography-ultraviolet　(HPLC-UV)　for　the　determination　of　four　phthalate　esters,　including　butyl　benzyl　phthalate,　di-n-butyl　phthalate,　dicyclohexyl　phthalate　and　bis(2-ethylhexyl)　phthalate　in　water　samples.　The　mixture　of　ionic　liquid　(IL)　and　dispersive　solvent　was　rapidly　injected　into　10　mL　aqueous　sample.　Then,　IL　phase　was　separated　by　centrifugation　and　was　determined　by　high-performance　liquid　chromatography-ultraviolet.　The　factors　influencing　the　extraction　efficiency,　such　as　type　and　volume　of　IL,　disperse　solvent,　extraction　time,　centrifuging　time　and　ionic　strength,　were　investigated　and　optimized.　Under　the　optimized　conditions,　the　extraction　recoveries　by　the　proposed　ionic　liquid-based　dispersive　liquid-liquid　micro-extraction　for　the　four　phthalates　ranged　from　83.0　to　91.7%.　The　relative　standard　deviations　were　between　7.8　and　15%.　The　limits　of　quantification　for　four　phthalates　were　between　10.6　and　28.5　mg/L.　The　proposed　method　was　successfully　applied　for　the　analysis　of　PAEs　in　tap,　lake　and　treated　wastewater　samples.