Abstract: The solvent effect on epoxidation of allyl chloride with hydrogen peroxide catalyzed by titanium slicalite-1(TS-1) in solvents with different kinds of functional group was studied. The results indicated that the performance of allyl chloride epoxidation was improved in the solvents with hydroxyl group and in acetone, but became worse in the solvents with nitrile group. The results are affected by the steric hindrance of solvent molecules in the channels of TS-1, and ethanol, isopropanol and t-butyl alcohol can be oxidized by H2O2 into aldehyde, ketone or peroxide respectively. The selectivity of TS-1 can be improved, but not as well as its stability when acetonitrile is added into methanol or acetone.