Three Ti-containing molecular sieves were studied in the oxidative desulfurization (ODS) of model diesel oil with hydrogen peroxide. Under optimal conditions, dibenzothiophene (DBT) conversion up to 80.6% and 42.6% could be obtained with Ti-HMS and Ti-MSU as catalysts, respectively. However, there is no activity in the sulfoxidation of DBT over TS-1. Effects of the TiO2/SiO2 ratio in Ti-HMS and reaction conditions, such as the reaction temperature, reaction time, n(H2O2)/n(S) on the sulfur removal were investigated.