A　dynamic　guidance　solution　based　on　＇digital　twin-driven　model＇　for　fire　evacuation　was　proposed　to　solve　the　prevalent　problems　of　building　emergency　evacuation.　And　this　model　can　also　solve　the　problems　that　the　current　expression　of　building　safety　evacuation　was　mainly　two-dimensional,　and　the　evacuation　path　planning　couldn＇t　be　carried　out　in　real　time　and　dynamically　according　to　the　development　trend　of　fire,　and　the　location　of　people　couldn＇t　be　considered.　The　proposed　method　used　BIM　(building　information　modeling)　and　IoT　(internet　of　things)　to　build　a　digital　twin-driven　model　for　evacuation,　integrated　the　information　of　space,　indoor　environment　and　personnel　location　in　the　proposed　model,　and　used　Dijkstra　algorithm　for　evacuation　path　planning.　Taking　a　building　in　the　bobsleigh　and　sled　stadium　of　the　2020　Beijing　Winter　Olympic　Games　as　an　example,　the　proposed　model　could　well　realize　the　functions　of　real-time　collection　of　environmental　information,　3D　visualization　of　indoor　layout,　fire　alarm,　indoor　personnel　positioning,　evacuation　path　planning,　etc.　©　2020,　Editorial　Department　of　Journal　of　Tongji　University.　All　right　reserved.