Nano ZnO-MWCNTs was successfully synthesized by hydrothermal method with the assistance of polyethylene glycol（PEG）.A ZnO-MWCNTs composite modified glassy carbon electrode（ZnO-MWCNTs/GCE） was prepared by coating method.The electrochemical behavior of bisphenol A at the modified electrode was investigated by cyclic voltammetry（CV） in the presence of cetyltrimethylammonium bromide（CTAB）.The effects of buffer pH,CTAB concentration and accumulation time on the determination were investigated.The results indicated that bisphenol A showed a good electrochemical response at the modified electrode in pH 7.0 phosphate buffer in the presence of 80×10-5 mol/L CTAB.The oxidation peak current in CV curves at ZnO-MWCNTs/GCE was 7 times as high as that at the unmodified electrode.CV studies also indicated that the electrooxidation of bisphenol A at the modified electrode was adsorption controlled,and totally irreversible process involved in two electrons and two protons.Under the optimum conditions,the oxidation peak current of bisphenol A in DPV curves was proportional over the concentration range of 5.0×10-8-1.5×10-5 mol/L with a detection limit of 1.0×10-8 mol/L.The relative standard deviations（RSDs） of eight measurements were 4.6% for 1.0×10-5 mol/L bisphenol A.This method was applied in the determination of dissoluted bisphenol A in plastics with recoveries of 99%-107%.