For　the　hydrogen-enriched　spark-ignited　Wankel　engine,　the　optimization　of　ignition　strategy　is　conducive　to　improve　combustion　performance　and　specifically　effective　to　lessen　the　unburned　region　due　to　the　elongated　rotor　chamber.　In　this　paper,　the　role　of　the　number　of　the　ignition　source,　twin-spark　plug　location,　asynchronous　ignition,　and　energy　allocation　in　improving　lean　combustion　was　investigated　through　the　three-dimensional　computational　fluid　dynamics　model　coupling　with　kinetic　mechanisms.　The　model　was　validated　by　experiment,　and　good　agreements　between　measured　and　predicted　combustion　pressure　and　the　heat　release　rate　was　obtained.　Results　showed　that　the　improvements　of　engine　combustion　were　limited　by　single-spark　ignition　strategies,　and　the　twin-spark　ignition　configuration　was　capable　of　enhancing　combustion　efficiency　drastically.　The　arrangement　of　the　twin-spark　plug　determined　the　space　for　flame　development,　and　it　was　favorable　for　the　trailing　plug　to　stand　a　greater　offset　from　the　minor　axis　of　the　engine.　An　earlier　leading-spark　ignition　enabled　flame　propagation　faster　and　occurred　quenching　rapidly,　which　contributed　to　higher　pressure-output　and　better　heat-release.　The　higher　energy　of　leading-spark　ignition　made　the　mixture　consumption　faster,　combustion　pressure　higher,　and　combustion　duration　shorter.　The　optimum　strategy　on　combustion　was　expressed　as　follows:　the　location　of　trailing-spark　plug　is　offset　from　the　minor　axis　by　20.7　mm;　the　spark　timing　and　discharge　energy　of　leading-spark　plug　is　325　degrees　EA　and　0.03　J,　respectively;　and　those　of　trailing-spark　plug　is　335　degrees　EA　and　0.01　J.　It　was　recommended　that　the　leading-spark　ignition　was　set　earlier　and　stronger　for　practical　operations.