The　heat　can　be　effectively　dissipated　and　the　harmful　humid　gas　and　dust　can　be　isolated　using　a　thermosyphon　spreader　in　a　general　sealed　electric　cabin.　The　heat　radiation　performance　of　the　thermosyphon　spreader　is　experimentally　investigated　under　different　heat　fluxes　(800-1200　W)　and　different　environmental　temperatures　(39-53°C).　Experimental　results　show　that　the　heat　radiation　performance　of　the　thermosyphon　spreader　is　good,　and　there　is　no　other　power　consumption　except　for　fans.　When　the　temperature　difference　between　the　inside　and　outside　of　the　cabin　is　less　than　20°C,　the　air　temperature　in　the　cabin　is　not　more　than　65°C　for　different　heat　fluxes　and　environmental　temperatures　using　the　thermosyphon　spreader.　The　temperature　difference　between　the　inside　and　outside　of　the　sealed　cabin　is　kept　in　the　range　of　11-17°C,　which　shows　that　the　thermosyphon　spreader　is　suitable　for　the　situations　with　about　15°C　temperature　difference　between　the　inside　and　outside　air.　In　addition,　the　thermosyphon　spreader　has　high　reliability,　the　energy　efficiency　ratio　(EER)　of　the　thermosyphon　spreader　is　2-3　times　as　much　as　that　of　the　conventional　air-conditioner,　and　the　cost　is　1/3~1/2　as　much　as　that　of　the　conventional　air-conditioner.