▎ 摘　　要

NOVELTY - Preparing nano-atom-level seawater desalination film involves providing a substrate and growing a nano-atom-level graphene film on the surface of the substrate by a chemical vapor deposition method. The water-soluble monomer and the water-insoluble monomer are subjected to an interfacial polymerization reaction on the surface of the graphene film to fill cracks and defects in the graphene film and obtain a novel nano-atom-level seawater desalination film. USE - Method for preparing nano-atom-level seawater desalination film used in the field of seawater desalination (claimed). ADVANTAGE - The method enables to prepare nano-atom-level seawater desalination film has a high selectivity and flux, realizes application prospect based on direct application of the concentration gradient film separation field, and has wide sea water desalting field.