This paper investigated the preparation of Potassium Iodate by Electrochemical Method. The influence of electrode material, current density, electrolyte temperature, pH on current efficiency and Potas sium Iodate yield was studied. The optimum experimental conditions for the preparation of Potassium Iodate are as follows: Anode Pb-PbO_2 Cathode Resistant Steel Current density (A/dm^2) 25 pH 8.5-9.5 Electrolyto temperature 50-60 ℃ Current efficiency 98% Potassium Iodate yield 89.7%