As　a　hydrogen　carrier,　ammonia　can　suppress　knock　and　enhance　thermal　efficiency　of　the　hydrogen-fueled　Wankel　rotary　engine　(WRE),　and　achieve　zero　carbon　emissions.　This　research　established　a　threedimensional　fluid　dynamics　model　coupled　with　detailed　reaction　kinetics　of　ammonia　and　hydrogen　and　verified　it　based　on　experiments.　Incorporating　10%　volume　fraction　of　ammonia　into　the　hydrogen-fueled　WRE　eliminates　knock　and　decreases　the　excess　air　ratio　(lambda)　from　1.8　to　1.4,　effectively　improving　the　indicated　mean　effective　pressure　(IMEP).　The　results　indicate　that　when　lambda　exceeds　1.4,　flame　propagation　accelerates　with　higher　concentration　of　the　mixture.　This　enhances　peak　in-cylinder　pressure　and　heat　release　rate,　but　it　results　higher　NOx　emissions.　As　lambda　varies　from　1.8　to　1.4,　NOx　emission　levels　rise　by　47.4%.　At　lambda　＜=　1.2,　the　rapid　flame　propagation　leads　to　short　combustion　duration,　diminishing　the　power　output.　At　this　stage,　the　NO　formation　is　dominated　by　H　radicals,　and　the　NOx　production　reaches　its　minimum　value　at　lambda　of　1.0.　In　summary,　the　ammonia-hydrogen　WRE　achieves　optimal　performance　at　lambda　of　1.4　and　ignition　timing　of　-5　degrees　CA　after　top　dead　center,　the　indicated　thermal　efficiency　reaches　36.9%　and　the　IMEP　achieves　0.683　MPa.