Abstract: In this paper, magnetic graphene foam composite was prepared via a solvent thermal method by using graphene oxide as precursor. The composites were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and field emission scanning electron microscope (FESEM) respectively. The adsorption behavior of composites for copper ion in aqueous solution was studied at different experimental parameters (initial concentration, reaction time and temperature). The results showed that the Fe3O4 was successfully combined into the grapheme to form the a three-dimensional foam structure. The adsorption amount of copper ion was 49.20 mg⁄g. The adsorption process was in accordance with the quasi two stage kinetic model. Magnetic composite can achieve rapid magnetic separation.