Chromium usually existed in soil in two valences,Cr(Ⅵ)and Cr(Ⅲ),which are different in charges.Previous studies showed that Cr electrochemical processes in soil were complex due to its varied valences and strong oxidation reduction reactions.This paper investigated Cr electrokinetic processes in Yellow brown soil as affected by hydrogen peroxide.The experiment was performed with a lab made electrokinetic setup,made up of electric power supply,a soil column,a four channel peristaltic pump,two electrode chambers,a pH controller and two solution reservoirs.The results show that Cr(Ⅵ)concentration in the soil after 564 h electrokinetic treatment significantly decreased as compared with the initial value(C₀=396 mg kg^-1).The presence of H₂O₂,as a model reductant of soil,caused Cr(Ⅵ)reduction to stable Cr(Ⅲ).Effect of H₂O₂ on electrical current was not obvious,but it significantly decreased the electroosmotic flow rate,suggesting its influence on soil surface structures and soil solution physical and chemical properties.All 4 treatments resulted in removal of over 85% Cr(Ⅵ) from soil.However,the total removal rate of Cr in the presence of H₂O₂ decreased.The maximum removal rate of total Cr and Cr (Ⅵ) was obtained,being 39.6% and 91.6% respectively during the electrokinet ic treatments.