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Both amination graphene and carbon fibers was cross-linked together using glutaraldehyde as composite support,then,prussian blue was electrodeposited at the surface(PB/GNs/CFs).The characterization of PB/GNs/CFs by field emission scanning electron microscopy,X-ray diffraction,fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy and electrochemical techniques confirmed the correct modification.Number of cubic prussian blue particles were uniformly coated at the surface with an average size of 19.32 nm.Selective adsorption and desorption of cesium(Cs+)were investigated at PB/GNs/CFs in aqueous solution,respectively.The maximum adsorption capacity could reach to 81.24 ± 2 mg/g at 25 ℃ and pH 7 with an endothermic and spontaneous process.The desorption percentage could reach 94.9%at 1.2 V with 10 min in pH 2,0.1 M KCl.At the optimum conditions,PB/GNs/CFs could be used to the recovery of Cs+from the residual of salt lake brine which potassium was removed in Qarham playa of Qaidam Basin.This work provided a efficient and convenient approach for exploring promising PB/GNs/CFs on the recovery of Cs+from the practical residual of salt lake brine which potassium was removed in Qarham playa of Qaidam Basin.The study is in progress.