A　computational　fluid　dynamics　model　was　established　and　validated　to　numerically　investigate　the　effects　of　different　injection　positions　and　injection　angles　on　the　mixture　formation　and　combustion　process　in　a　gasoline　direct　injection　rotary　engine.　The　results　show　that　as　the　injection　position　approaches　the　top　dead　center　and　the　increasing　injection　angle,　the　rich　zone　of　fuel　changes　from　the　rear　to　the　front　of　the　combustion　chamber.　The　local　equivalence　ratio　near　the　two　spark　plugs　shows　an　increasing　trend　with　the　injection　position　upward　and　the　increasing　injection　angle.　Compared　with　the　lower　and　middle　injection　positions,　the　upper　injection　positions　can　make　fuel　more　concentrated　near　the　leading　spark　plug　and　the　trailing　spark　plug　at　ignition　timing.　The　injection　strategies　corresponding　to　the　upper　injection　position　are　conducive　to　complete　combustion,　in　which　the　mass　fraction　of　fuel　burned　all　beyond　99%.　Besides,　with　the　increasing　injection　angle,　the　oil　film　formation　position　changes　from　the　rotor　recess　to　the　middle　cylinder　block,　which　further　affects　the　mixture　formation　and　combustion　process.　Especially,　the　highest　peak　pressure　is　obtained　at　0　degrees　injection　angle　corresponding　to　the　upper　injection　position　and　is　12.39%　higher　than　the　in-cylinder　peak　pressure　of　intake　port　injection.