The　ignition　and　combustion　behaviors　of　single-particle　aluminum　in　a　water　vapor　environment　are　among　the　most　important　basic　research　aspects　of　metal　fuels　and　solid　propulsion　technologies.　In　this　paper,　the　ignition　and　combustion　behaviors　of　aluminum　particles　in　a　water　vapor　environment　were　modeled　based　on　a　traditional　aluminum　particle　ignition　model　and　the　finite　difference　method.　In　addition,　a　metal　single-particle　ignition　combustion　test　system　was　used　to　carry　out　relevant　validation　experiments.　The　validation　results　showed　that　the　average　error　of　the　model　remained　within　10%.　In　addition,　an　initial　oxide　layer　fusion　module　was　established　in　conjunction　with　the　results　of　a　material　mechanics　study　of　Al/Al2O3.　Moreover,　the　model　was　used　to　calculate　the　ignition　behavioral　parameters　(ignition　delay　time　and　ignition　temperature)　of　the　aluminum　particles　under　different　initial　parameters.　Finally,　an　intrinsic　mechanism　model　was　created　to　evaluate　the　influences　of　the　relevant　parameters　on　the　ignition　behaviors　of　the　aluminum　particles.　The　model　results　showed　that　the　initial　oxide　layer　ruptured　during　the　aluminum　melting　stage,　the　phase　transition　stress　was　the　main　factor　leading　to　oxide　layer　rupture,　the　ambient　temperature　had　a　great　influence　on　the　ignition　temperature,　and　all　four　initial　parameters　were　negatively　correlated　with　the　ignition　delay　time.