Graphene　oxide　(GO)　is　regarded　as　a　promising　next-generation　high-performance　separation　membrane　material.　However,　the　flexiblility　of　single-layer　GO　nanosheets　usually　results　in　membrane　with　poor　stability　under　practical　conditions.　In　this　study,　we　present　a　facile　strategy　to　rapidly　convert　single-layer　nanosheet　GO　membranes　into　supra-nanosheet　GO　(sGO)　membranes　with　a　loose　rigid　structure　by　a　confined　gelling　and　crosslinking　process.　The　optimized　sGO　membrane　exhibits　remarkable　water　permeance　and　retention　capability.　With　additional　tailor-made　nanopores,　the　water　permeance　of　the　sGO　membrane　could　reach　52.0　LMH/bar,　representing　10-fold　increase　compared　to　pristine　GO　membrane.　Furtheermore,　this　membrane　demonstrates　excellent　pressure　stability　and　unique　elasticity,　enhancing　its　lorg-term　operational　reliability　and　reversible　recovery.　Hence,　this　innovative　strategy　provides　a　platform　for　the　facily　construction　of　highly　stable　2D　membranes　with　enhanced　water　transport　channels.