Abstract: Alumina-supported Ni2P catalysts were prepared by the mixture of pseudo-boehmite and nickel hypophosphite. The catalysts were characterized by N2 adsorption-desorption, X-ray diffraction and transmission electron microscopy. The specific surface area of a Ni2P/γ-Al2O3 catalyst with 15wt% Ni2P is 166cm2/g. The active component Ni2P is well dispersed on the γ-Al2O3 support with a particle size of 5-7 nm shown by TEM analysis. The catalytic performance of the catalyst was evaluated in a fixed-bed reactor for cyclohexane dehydrogenation. Under the conditions of a reaction temperature of 420 oC, a reaction pressure of 0.5 MPa, a WHSV of 1 h-1, and a hydrogen-to-cyclohexane molar ratio of 0.24, the conversion of cyclohexane and selectivity of benzene reaches 99.5% and 99.8%, respectively.