A　simple　dispersive　solid-phase　extraction　(DSPE)　used　to　extract　and　preconcentrate　ultra-trace　MeHg,　EtHg　and　Hg2+　from　water　sample,　and　a　sensitive　method　for　the　simultaneous　analysis　of　MeHg,　EtHg　and　Hg2+　by　using　capillary　electrophoresis-inductively　coupled　plasma　mass　spectrometry　(CE-ICP-MS)　with　field-amplified　sample　stacking　injection　(FASI)　were　first　reported　in　this　study.　The　DSPE　used　thiol　cotton　particles　as　adsorbent,　and　is　simple　and　effective.　It　can　be　used　to　extract　and　preconcentrate　ultra-trace　mercury　compounds　in　water　samples　within　30　min　with　a　satisfied　recovery　and　no　mercury　species　alteration　during　the　process.　The　FASI　enhanced　the　sensitivity　of　CE-ICP-MS　with　25-fold,　29-fold　and　27-fold　for　MeHg,　EtHg　and　Hg2+,　respectively.　Using　FASI-CE-ICP-MS　together　with　DSPE,　we　have　successfully　determined　ultra-trace　MeHg,　EtHg　and　Hg2+　in　tap　water　with　a　limits　of　quantification　(LOQs)　of　0.26-0.45　pg/　mL,　an　RSD　(n　=　3)　＜　6%　and　a　recovery　of　92-108%.　Ultra-high　sensitivity,　as　well　as　much　less　sample　and　reagent　consumption　and　low　operating　cost,　make　our　method　a　valuable　technique　to　the　speciation　analysis　of　ultra-trace　mercury.