Subway　transfer　station　is　the　intersection　of　the　lines　in　the　subway　network　structure.　In　this　paper,　the　simulation　model　of　fire　simulation　is　established　with　Liuliqiao　station　of　cross　type　subway　station.　The　influence　of　the　piston　wind　effect　on　the　spread　control　of　fire　smoke　at　the　bottom　platform　was　studied.　Through　analysis,　the　piston　wind　effect　strengthens　the　airflow　disturbance　in　the　station,　and　accelerates　the　deposition　of　the　smoke　layer,　which　is　not　conducive　to　the　evacuation　of　personnel.　(C)　2017　The　Authors.　Published　by　Elsevier　Ltd.