Carbon　nanotubes　(CNTs)　filled　perfluoroalkoxy　(PFA)　films　with　the　thicknesses　of　about　10　mu　m　have　been　prepared　via　blade　coating.　Both　of　the　CNTs　and　PFA　are　aqueous　dispersion,　which　are　favorable　for　the　uniform　dispersion　of　fillers　into　the　matrix.　The　morphology,　direct　current　(DC)　resistivity,　electrothermal　property,　and　thermal　diffusivity　of　the　composite　films　were　studied.　We　find　out　that　the　fraction　of　CNTs　played　a　vital　role　in　the　heating　property　and　thermal　transferring　capacity　of　the　composite　films.　Under　the　input　voltage　of　110　V,　the　temperature　of　PFA　composite　film　with　15　wt　%　CNT　reached　to　200(omicron)C,　and　the　thermal　diffusivity　was　about　3.3　mm(2)/s.　We　believe　these　CNTs/PFA　films　are　promising　alternatives　to　work　as　flexible　electric　heating　devices.　(C)　2017　Wiley　Periodicals,　Inc.