▎ 摘　　要

NOVELTY - Provided is a method for preparing a graphene oxide-ferrum composite film, to solve problems existing in the conventional methods that may not prepare graphene oxide film able to maintain stable structure thereof as soaking in the solution, comprising steps of preparing a graphene oxide solution; mixing a ferrous ion salt with the graphene oxide solution in a weight ratio of from 1:4 to 1:8, to obtain a mixed solution; pumping the mixed solution, to obtain a black film; and drying the black film to obtain the graphene oxide-ferrum composite film. A graphene oxide-ferrum composite film comprises a plurality of graphene oxide-ferrum composite film layers and ferrous ions. The ferrous ions are connected to hydroxyl group, epoxy group, carbonyl group, and carboxyl group existing on the surface of each graphene oxide-ferrum composite film layer. A use of graphene oxide-ferrum composite film for removing pollutants from wastewater.