▎ 摘　　要

NOVELTY - The film is provided with a support layer and a function layer, where the function layer is provided with a laminated structure. USE - Layer-by-layer self-assembling graphene oxide nano-filter film. ADVANTAGE - The film has better interception effect, better hydrophilicity, better permeability and retention, and is simple in preparation process and wide in application range. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a layer-by-layer self-assembling graphene oxide nano-filter film. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a layer-by-layer self-assembling graphene oxide nano-filter film.