▎ 摘　　要

NOVELTY - Preparing nanosized composite material involves putting graphene oxide-glass fiber into a muffle furnace for calcining with acetone and alkali, placing in aqueous solution of silane coupling agent, removing after washing and soaking into bovine serum albumin solution, cleaning in the graphene oxide-glass fiber suspension, drying, putting into alkaline sodium borohydride solution, heating, stirring, drying to obtain graphene oxide-glass fiber as anode, carbon rod as cathode to construct an electrophoresis cell, putting 1.0-1.5 mg/ml ferroferric oxide suspension as plating solution in the cell. USE - Method for preparing nanosized composite material (claimed). ADVANTAGE - The nanosized composite material has higher magnetic permeability and enables to improve the electromagnetic shielding performance. DETAILED DESCRIPTION - Preparing nanosized composite material involves putting graphene oxide-glass fiber into a muffle furnace for calcining with acetone and alkali, placing in aqueous solution of silane coupling agent, removing after washing and soaking into bovine serum albumin solution, cleaning in the graphene oxide-glass fiber suspension, drying, putting into alkaline sodium borohydride solution, heating, stirring, drying to obtain graphene oxide-glass fiber as anode, carbon rod as cathode to construct an electrophoresis cell, putting 1.0-1.5 mg/ml ferroferric oxide suspension as plating solution in the cell, depositing graphene oxide-glass fiber in electrophoresis cell to obtain graphene oxide-glass fiber composite material.