Ignition　timing　is　an　important　parameter　for　spark-ignited　engine.　Hydrogen　replenishment　effectively　improves　the　performance　of　engine.　This　paper　experimentally　investigated　the　impact　of　ignition　timing　on　performance　of　a　hydrogen-enriched　n-butanol　rotary　engine.　For　this　purpose,　a　rotary　engine　installed　with　a　dual-fuel　(hydrogen　and　n-butanol)　port　injection　system　was　specially　developed.　An　electronic　management　module　was　solely　developed　to　control　the　fuel　injection,　excess　air　ratio　and　hydrogen　proportion.　In　this　experiment,　the　engine　was　run　at　4000　rpm,　an　intake　pressure　of　35　kPa　and　an　excess　air　ratio　of　1.10.　Hydrogen　volume　ratio　was　set　at　0%　and　3%,　respectively.　When　hydrogen　fraction　was　changed,　n-butanol　injection　was　also　adjusted　to　make　excess　air　ratio　be　1.10.　For　0%　and　3%　hydrogen　addition,　ignition　timing　was　severally　varied　from　35　to　51　degrees　CA　BTDC　and　29　to　45　degrees　CA　BTDC　with　an　interval　of　2　degrees　CA.　Experimental　results　showed　that　with　the　increase　of　ignition　advance,　both　peak　chamber　pressure　and　temperature　were　increased,　brake　thermal　efficiency　was　initially　ascended　and　then　declined.　Flame　development　period　was　prolonged　whereas　flame　propagation　period　was　shortened　as　ignition　advance　increase.　Cyclic　variation　was　initially　weakened　and　then　deteriorated　by　advancing　ignition.　HC　and　NOx　emissions　were　reduced　after　retarding　ignition　timing.　Ignition　timing　had　little　influence　on　CO　emission.