A　liquid-air　self-assembly　strategy　is　proposed　to　uniformly　hybridize　hydrophobic　graphene　with　amphiphilic　polymer,　like　PVA　(poly(vinyl　alcohol)),　in　a　thin　membrane,　where　the　polymer　imparts　aqueous-dispersion　and　membrane-forming　abilities　to　the　encapsulated　graphene.　The　microstructure,　transmittance　and　wettability　of　the　GNS/PVA　hybrid　membranes　are　finely　tunable　by　changing　the　GNS　fraction.　Due　to　strong　interaction　between　GNSs　and　PVA,　the　GNS-incorporated　hybrid　membrane　formed　at　liquid-air　interface　shows　improved　thermal　stability　and　highly　enhanced　mechanical　performance　as　compared　to　GNS-free　PVA　membrane.　Also,　well-distributed　GNS　in　the　transparent　polymer　carrier　make　the　hybrid　membrane　an　ideal　saturable　absorber　in　ultrafast　laser　systems.