A novel plate-type glass-supported gold-film electrode was fabricated by means of ion sputtering.Cr（Ⅵ） could be electrochemically reduced at the proposed electrode.After optimization of parameters,including sputtering time,current and supporting electrolyte,Cr（Ⅵ） could be determined using either linear sweep voltammetry with a detection limit（S/N=3） of 6.5 μg/L or amperometry with a detection limit of 2.0 μg/L.The batch-by-batch reproducibility（n=10） was 9.2%and the electrode-by-electrode reproducibility（n=10） in same batch ranged from 9.2%to 25.8%.The proposed electrode is easy-to-fabricate and economical,and is available for mass production.The method was applied in the determination of Cr（Ⅵ） in real samples including plastic and lake water,and the results were consistent with those obtained by the HPLC-ICP-MS method.