A　CFD　model　of　hydrogen-enriched　gasoline　Wankel　rotary　engine　is　established　and　validated.　The　mixture　formation　and　combustion　processes　are　investigated　under　both　hydrogen　port　and　direct　injection　enrichment　conditions　with　different　hydrogen　addition　levels.　It　was　found　that,　under　hydrogen　port　injection　enrichment　conditions,　the　peak　in-cylinder　pressure　of　6%　is　8.4%　higher　that　of　3%.　Meanwhile,　under　hydrogen　direct　injection　enrichment　conditions,　the　peak　in-cylinder　pressure　of　3%　hydrogen　direct　injection　enrichment　is　15.3%　higher　than　that　of　3%　hydrogen　port　injection　enrichment.　It　was　also　found　that　the　mainstream　field　with　same　direction　of　rotor　rotation　is　formed　during　the　compression　stroke　and　a　vortex　with　high　vorticity　existed　in　the　combustion　chamber.　With　the　effects　of　mainstream　field　and　vortex,　the　hydrogen　fills　more　than　half　volume　of　the　entire　combustion　chamber　under　4%,　5%　and　6%　HDIE　conditions.　At　the　same　time,　a　local　low　velocity　zone　is　formed　around　the　vortex　because　the　hydrogen　direct　injection　flow　slows　down　the　dissipation　of　vortex.　According　to　the　analysis　by　PREMIX,　the　fastest　flame　speed　is　achieved　at　equivalence　ratios　around　1.4.　The　proper　rich　hydrogen　region　distribution　is　obtained　under　4%,　5%　and　6%　hydrogen　direct　injection　enrichment　conditions.　Both　the　enhanced　flame　propagation　by　proper　equivalence　ratio　distribution　and　the　reduced　local　mainstream　flow　velocity　by　vortex　existence　contribute　to　solving　the　unburned　zone　problem.　Compared　with　6%　hydrogen　port　injection　enrichment,　the　maximum　value　of　in-cylinder　pressure　of　4%,　5%　and　6%　hydrogen　direct　injection　enrichment　is　improved　by　59.6%,　88.4%　and　91.6%,　respectively.　However,　carbon　monoxide　and　nitrogen　oxide　emissions　are　increased　obviously.　As　a　relatively　low　carbon　monoxide　emission　is　obtained　with　4%　case　under　hydrogen　direct　injection　enrichment　conditions　and　the　problem　of　unburned　zone　in　the　rear　region　of　combustion　chamber　is　solved.　The　hydrogen　volume　fraction　of　4%　with　direct　injection　enrichment　achieves　the　best　engine　performance　in　this　study.