▎ 摘　　要

NOVELTY - An iron cyanide nickel/graphene composite material preparing method involves performing thermal reduction of graphene and iron cyanide nickel to obtain two precursor solution. The two precursor solution is mixed thoroughly, placed in reaction flask and subjected for simple mechanical stirring for a certain time to obtain the finished product. USE - Method for preparing iron cyanide nickel/graphene composite material for separating caesium ions. ADVANTAGE - The method enables preparing iron cyanide nickel/graphene composite material with excellent separation performance, in simple, easy and cost effective manner.