Air-supported　membrane　structures　are　widely　used.　The　stiffness　and　shape　of　such　structures　depend　on　the　pressure　difference　between　indoor　and　outdoor　environments.　As　the　leakage　of　indoor　air　may　lead　to　the　collapse　of　the　structure,　it　is　necessary　to　study　the　deflation　deformation　process,　including　the　properties　that　can　cause　air-supported　membrane　structures　to　collapse.　In　this　study,　a　new　theoretical　model　of　the　collapse　property　was　proposed.　The　collapse　process　was　divided　into　two　stages:　the　strain-releasees　stage　and　the　collapse　stage.　The　two　stages　are　described　by　two　different　differential　equations.　The　results　obtained　from　existing　experimental　studies　and　numerical　models　are　compared　with　those　obtained　by　the　method　proposed　in　this　paper.　The　method　proposed　in　this　paper　can　predict　the　collapse　process　of　air-supported　structures　at　different　scales.　Finally,　the　sensitivity　analysis　was　used　to　research　the　relation　between　collapse　time　and　leakage　area,　collapse　pressure　difference　and　temperature.　Copyright　©　2024　by　Suduo　Xue,　Fei　Yan　and　Guojun　Sun.