Using　a　single-walled　carbon　nanotubes　(SWCNTs)　as　stationary　phase　of　solid-phase　microextraction　(SPME)　fibers,　a　simple,　low　cost　and　environmentally　friendly　method　for　extraction　of　13　pesticides　in　Tea　samples　has　been　developed　following　gas　chromatography-mass　spectrometric　determination.　Potential　factors　affecting　the　extraction　efficiency　were　investigated　and　optimized,　including　extraction　and　desorption　time,　extraction　temperature,　stirring　rate,　solution　pH　and　ionic　strength.　Under　optimized　conditions,　the　linearity　of　the　developed　method　was　in　the　range　of　0.125-25　ng/mL　with　correlation　coefficients　greater　than　0.9928　and　the　limits　of　detections　(LODs)　were　0.027-0.23　ng/mL　(S/N　=　3).　Meanwhile,　the　relative　standard　deviations　(RSDs)　for　five　successive　measurements　with　single　fiber,　fiber-to-fiber,　day-to-day　were　2.3-13.0,　8.2-14.6　and　4.1-12.5%,　respectively,　indicating　good　reproducibility　of　the　proposed　method.　The　fiber　had　high　extraction　efficiency　for　studied　pesticides　in　comparison　with　commercial　poly(dimethylsiloxane)　(PDMS)　and　polyacrylate　(PA)　fibers　and　could　be　used　for　more　than　70　times　without　decrease　of　efficiency.　The　developed　method　was　successfully　applied　for　the　analysis　of　real　samples　including　green　Tea,　oolong　Tea,　white　Tea,　and　flower　Tea,　and　the　recoveries　of　the　pesticides　spiked　in　these　samples　ranged　from　75.1　to　118.4%.　Chlorfenapyr　and　lambda-cyhalothrin　were　found　in　the　Tea　samples　bought　randomly　from　local　market.　The　results　demonstrated　that　the　developed　SWCNTs-SPME　method　was　a　simple,　efficient　pretreatment　and　enrichment　procedure　for　pesticides　in　complex　matrices.　(C)　2010　Elsevier　B.V.　All　rights　reserved.