Abstract: A Ni-Al composite catalyst was synthesized using the urea hydrolysis method, first used in levuliniv acid (LA) hydrogenation reactions. This catalyst is known to efficiently catalyze the hydrogenation reaction of LA to GVL in a 1,4-dioxane system under mild conditions and obtain γ-Valerolactone (GVL), a biomass based platform compound with broad application prospects . XRD, H2-TPR, SEM, XPS and some other method had been used for catalysts characterization and results show high activity of the Ni/Al2O3 catalyst was primarily a cause of the Ni0 metal sites and the interaction between Ni and Al2O3. Different ratios of Ni/Al directly affected the size and distribution of metallic Ni particles. Ratios of Ni/Al content that were either too high or too low brought about reductions in catalytic activity. When the ratio was 2, and with the reaction conducted at 140℃ and 3 MPa H2 for 2 hours, the hydrogenation of LA achieved a 100% yield of GVL.