The　study　analyzed　and　compared　the　effects　of　thermal-fluid-solid　coupling　dynamic　boundary　conditions　and　traditional　fixed　-boundary　conditions　on　the　distribution　of　the　temperature　field　under　fires.　The　feasibility　of　simulating　the　temperature　field　distribution　was　confirmed　by　using　thermal-fluid-solid　coupling　dynamic　boundary　conditions.　Then,　the　traditional　temperature　field　analysis　methods　were　corrected　by　including　a　flow　-based　heat　exchange　coefficient,　and　the　feasibility　of　this　approach　was　also　confirmed.　The　fire　temperature　field　in　a　rectangular　air　-supported　membrane　structure　was　analyzed　through　parameterization.　The　fire　temperature　field　model　of　the　air　-supported　membrane　structure　was　established　using　temperature　field　data　fitting.　Furthermore,　the　study　explored　the　high　-temperature　material　properties　of　P　-type　membranes　and　analyzed　and　compared　the　temperature　field　of　the　air　-supported　membrane　structure　with　time　-varying　mechanical　properties　of　the　membrane　material　to　that　without　time　-varying　properties.