▎ 摘　　要

NOVELTY - Preparing self-assembled pleated reduced graphene oxide composite film involves depositing dopamine on the pretreated porous base film to form a polydopamine modified layer with rich amine groups, and the deposition time is 3 h. The graphene oxide is suction filtered onto a porous substrate having a rich amine group, and the concentration of graphene oxide is 0 to 1 g/l excluding 0, and the assembly time is 0 to 30 min excluding 0. The graphene oxide composite film prepared is placed in a preheated organic solvent, and the modified graphene oxide composite film is prepared at 80-120 degrees C, and the solvent is removed by washing and adding cross-linking in an aqueous solution, preferably, the concentration of crosslinking agent A is 0-1.5% by weight, and the crosslinking time is 24 hours. USE - Method for preparing self-assembled pleated reduced graphene oxide composite film for treating water. DETAILED DESCRIPTION - The electrolyte solution is suction filtered to the surface of the modified graphene oxide film of and is crosslinked in the aqueous solution of the crosslinking agent B. The concentration of the aqueous solution of the crosslinking agent B is 0-1.5 wt.%, and the crosslinking time is 0.5 h.