▎ 摘　　要

NOVELTY - Preparing hydrophilic and hydrophobic composite film involves soaking hydrophobic porous base film into oil phase monomer solution, taking out to obtain oily porous film; contacting oily porous film and aqueous phase monomer solution followed by polymerization to obtain final product. USE - Method for preparing hydrophilic and hydrophobic composite film used for film distillation, crystallization, absorption and extraction (claimed). ADVANTAGE - The method has fast preparation speed; simple operation method and easy to amplify, without pre-processing surface of hydrophobic porous base film; has high flux and excellent pollution resistance; has excellent stain resistance, without damaging original structure of film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a hydrophilic and hydrophobic composite film.