Although　an　efficient　and　stable　fiber　coating　is　essential　for　the　development　of　the　solid-phase　microextraction　(SPME)　technique,　it　remains　a　challenging　prospect.　We　report　herein　the　construction　of　graphitic　carbon　nitride　derivative　(g-C3N4-d)　nanosheets　having　a　large　surface　area,　large　mesopores　(3.15　and　36.6　nm),　and　abundant　adsorption　sites,　and　the　application　of　coating　g-C3N4-d　on　an　SPME　fiber.　The　coated　SPME　fiber　combined　with　gas　chromatography-mass　spectrometry　(GC-MS)　was　used　for　the　determination　of　polycyclic　aromatic　hydrocarbons　(PAHs).　The　coating　contained　large　mesopores　that　accommodated　large　target　molecules　and　promoted　molecular　diffusion　inside　the　coating　sorbent.　The　coating　demonstrated　significant　extraction　capability　toward　PAHs　because　of　multiple　interactions,　including　hydrophobic　and　strong　pi-pi　interactions.　Under　optimal　conditions,　the　limits　of　detection　for　PAHs　were　achieved　within　the　range　of　0.01-0.10　ng　L-1.　The　method　developed　to　detect　eight　PAHs　in　six　river　water　samples　from　different　cities,　and　the　recoveries　were　ranging　from　83.3　to　103.0%.　The　g-C3N4-d　nanosheet-coated　fiber　was　sufficiently　stable　to　be　recycled　more　than　200　times　without　obvious　loss　of　extraction　capacity.　This　study　describes　the　development　of　a　novel　SPME　adsorbent　having　excellent　analytical　properties.