The　compound　intake　possesses　large　port　area.　Applying　it　in　Wankel　rotary　engine　(WRE)　could　increase　volumetric　efficiency　and　reduce　pumping　loss.　To　investigate　the　effect　of　the　compound　intake　on　the　mixture　formation　and　combustion　process　in　gasoline　WREs　with　hydrogen　port　and　direct　injected　(HPI　and　HDI)　enrichment,　a　three-dimensional　computational　fluid　dynamics　(CFD)　model　was　established　and　validated.　Investigation　results　showed　that　the　peripheral-ported　intake　flow　plays　a　leading　role　in　the　compound-ported　WRE.　Because　the　peripheral-ported　intake　flow　has　the　same　direction　with　the　rotor　movement,　the　formation　time　of　mainstream　flow　field　is　shortened　and　the　mean　flow　speed　is　increased,　the　flame　propagation　in　the　same　direction　with　mainstream　flow　field　is　accelerated.　Meanwhile,　the　improvements　in　volumetric　efficiency　and　quality　of　in-charged　mixtures　result　in　the　rise　of　temperature　and　pressure　at　spark　timing,　which　could　also　improve　the　initial　thermal　conditions.　Therefore,　the　compound　intake　effectively　accelerates　the　combustion　process　in　WRE.　In　HPI　conditions,　compared　with　the　side-ported　WRE,　the　peak　in-cylinder　pressure　and　indicated　thermal　efficiency　in　compound-ported　WRE　are　respectively　increased　by　4.5%　and　3.9%.　In　HDI　conditions,　the　flame　could　propagate　to　the　rear　combustion　chamber　and　eliminate　the　unburned　zone,　the　maximum　in-cylinder　pressure　and　indicated　thermal　efficiency　in　side-ported　WRE　with　HDI　are　84.7%　and　6.6%　higher　than　those　of　in　side-ported　WRE　with　HPI.　At　the　same　time,　the　compound　intake　could　further　increase　the　in-cylinder　pressure　and　indicated　thermal　efficiency　by　6.8%　and　2.5%,　respectively.　However,　the　improved　combustion　performance　increases　the　in-cylinder　temperature,　which　provides　a　suitable　thermal-atmosphere　for　nitrogen　oxide　(NOx)　formation.　The　compound　intake　increases　mass　fractions　of　NOx　emissions　from　0.111%　to　0.141%　in　HPI　conditions　and　those　from　0.268%　to　0.284%　in　HDI　conditions.　Considering　the　compound　intake　promotes　the　combustion　characteristics　and　effectively　decreases　carbon　monoxide　(CO)　emission　from　0.043%　to　0.033%　in　HPI　conditions,　and　from　0.008%　to　0.003%　in　HDI　conditions,　it　is　a　feasible　way　to　improve　the　performance　of　WREs.　Especially,　combining　it　with　HDI　could　obtain　a　better　engine　performance　under　low　engine　speed　and　part　load　conditions.