With　the　massive　increase　of　subway　passengers　in　large　Chinese　cities,　thermal　comfort　in　the　subway　has　become　an　important　topic.　The　thermal　comfort　of　subway　passengers　is　different　from　that　in　above-ground　buildings　and　has　its　own　particularities,　as　the　subway　comprises　of　underground　semi-closed　buildings.　Moreover,　the　thermal　environment　experienced　by　passengers　is　dynamic.　Considering　these　reasons,　this　study　adopts　a　dynamic　thermal　comfort　study　method　for　investigating　thermal　sensations　in　the　subway.　The　field　study　was　conducted　in　two　Beijing　subway　stations　in　May　2016　and　June-July　2017,　and　a　total　of　628　samples　were　obtained.　Variations　in　thermal　sensation　and　thermal　comfort　were　analyzed.　The　results　showed　that　the　thermal　sensations　of　subway　passengers　change　dramatically　through　the　entire　process,　and　alternate　between　hot　and　cold.　For　the　station　hall　and　platform,　although　the　temperature　and　the　relative　humidity　were　beyond　the　standard　range　of　the　＂Code　for　Design　of　Metro　in　China＂　(GB501572013),　passengers　find　them　acceptable.　The　study　also　provides　reliable　basic　data　for　the　design　and　operation　management　of　ventilation　and　air-conditioning　systems　in　the　subway　station,　so　as　to　create　a　comfortable　thermal　environment　for　subway　passengers.