Direct-injection　hydrogen　rotary　engines　suffer　from　the　problem　of　the　injection　flow　rate　due　to　the　limitation　of　the　injector.　Supplying　hydrogen　in　the　pre-chamber(PC)　can　reduce　the　injection　pressure　and　increase　the　hydrogen　flow　rate.　Therefore,　a　novel　hydrogen　direct　injection　stratified　combustion　rotary　engine(HDISC-RE)　based　on　the　concept　of　PC　is　proposed　in　this　study.　For　the　proposed　HDISC-RE,　all　of　the　hydrogen　is　supplied　in　the　PC　and　is　ignited　during　injection　to　achieve　stratified　combustion.　HDISC　under　different　injection　strategies　was　investigated　in　this　study.　The　results　show　that　the　reliability　of　ignition　is　enhanced　as　the　injection　duration(ID)　is　shortened.　As　the　injection　ratio　increases　(referring　to　the　ratio　of　hydrogen　mass　injected　before　and　after　ignition),　the　hydrogen　gradually　moves　towards　the　minor　semi-axis,　stabilizing　the　flame　in　the　rotor　pocket.　The　distribution　of　hydrogen　becomes　more　ideal　with　the　shortening　of　ID　and　the　increase　of　injection　ratio.　Thus,　HDISC　can　achieve　the　highest　ITE　of　29.8　%　and　the　lowest　unburned　hydrogen　of　8.11　%.　The　result　shows　that　the　combustion　mode　of　HDISC　is　more　promising,　and　the　variation　of　injection　strategy　can　effectively　control　the　hydrogen　combustion　process.