▎ 摘　　要

NOVELTY - Preparing efficient seawater desalination membrane involves taking microporous membrane as surface membrane and polyamide-based membrane as intermediate layer. USE - Method for preparing efficient seawater desalination membrane ADVANTAGE - The method enables to solve defect of the existing film, using the mode of sandwich structure using microporous filtering film to protect the polyamide film, reaching the effect of improving the service life, film integral structure has high mechanical strength, satisfying the current mechanical strength requirement.