Abstract: Using 1-methylnaphthalene as a model compound and sulfided CoMo/γ-Al2O3，NiW/γ-Al2O3，NiMo/γ-Al2O3，NiMoW/γ-Al2O3 as catalysts，the hydrogenation saturation performance of 1-methylnaphthalene on the four different catalysts was studied using a high pressure hydrogenation micro-reactor. It is found that the NiMoW/γ-Al2O3 catalyst has the best saturation performance for 1- methylnaphthalene and the CoMo is the lowest. The higher the activity is, the easier the aromatic saturation of 1- methylnaphthalene is to reach the thermodynamic equilibrium and the less sensitive to the change of reaction pressure. In the products the amount of 5-methyl tetralin is as twice as 1-methyl tetralin.