The　graphene　oxide　nanoribbons　were　prepared　by　longitudinally　unzipping　the　multiwalled　carbon　nanotubes,　and　then　thermoplastic　polyurethane(TPU)　composite　films　containing　graphene　oxide　nanoribbons　(GONRs)　and　graphene　oxide(GO)　were　fabricated　by　the　solution　casting　method.　The　results　of　FE-SEM　and　XRD　indicate　that　GONRs-GO　in　TPU　matrix　are　fully　exfoliated　and　uniformly　dispersed　in　the　TPU　matrix;　Oxygen　transmission　rate(OTR)　and　mechanical　testing　indicate　that　GONRs　and　GO　exhibit　a　synergistic　effect　on　improving　the　barrier　and　mechanical　properties　of　TPU　composite　films.　Adding　with　1.5%　GONRs　and　1.5%　GO　into　the　TPU　matrix　at　the　same　time,　the　barrier　properties　and　mechanical　properties　of　GONRs-GO/TPU　composite　films　can　gain　the　best　results.　Moreover,　compared　with　the　pure　TPU　film,　the　OTR　of　GONRs-GO/TPU　composite　films　declines　by　about　83.94%,　and　the　tensile　strength,　the　yield　strength　and　the　elongation　at　break　are　increased　by　59.28%,　59.54%　and　15.0%　respectively.　©,　2015,　Chengdu　University　of　Science　and　Technology.　All　right　reserved.