The　present　paper　introduced　an　experiment　survey　focusing　on　exploring　the　impact　of　hydrogen　enrichment　on　improving　the　lean-burn　performance　of　an　n-butanol　rotary　engine.　During　the　test,　the　engine　speed　and　intake　pressure　were　roughly　set　at　4000　rpm　and　35　kPa,　respectively.　A　constant　spark　advance　of　45　CA　was　adopted　through　the　test.　Hydrogen　volumetric　fraction　of　the　total　intake　was　severally　kept　at　0%　and　3%.　The　testing　results　manifested　that　the　brake　thermal　efficiency　and　peak　chamber　temperature　were　heightened　with　hydrogen　addition.　Besides,　the　ignition　delay　and　rapid　combustion　duration　were　both　reduced　with　the　hydrogen　additive.　Engine　running　stability　gained　an　improvement　by　hydrogen　supplement.　Moreover,　HC　and　CO　emissions　from　the　original　n-butanol　rotary　engine　were　reduced　after　hydrogen　adding.　NOx　emissions　were　increased　with　hydrogen　enrichment　while　reduced　with　the　increase　of　excess　air　ratio.　This　indicated　that　NOx　emissions　from　both　the　n-butanol　and　hydrogen-blended　n-butanol　rotary　engines　could　be　reduced　by　lean　combustion　strategies.