Abstract: The oxidation of BT and DBT in model light oil by potassium ferrate was investigated. The results show that the oxidation activity of K2FeO4to BT and DBT in water phase is lower because K2FeO4 reacts rapidly with water to form brown Fe(OH)3 to lose the ability of oxidation to organic sulfur compounds. The oxidation activity of K2FeO4 to BT and DBT increases markedly in acetic acid. The addition of the solid catalyst to acetic acid medium can remarkably promote the oxidation of organic sulfur compounds. The DBT of 98.4% and BT of 70.1% can be converted under the condition of room temperature, atmospheric pressure, acetic acid/ model oil (volume ratio)=1.0, K2FeO4/S (mol ratio)=1.0 and catalyst/K2FeO4 (weight ratio)=1.0.