NOVELTY - A nickel-based saturated hydrogenation catalyst comprises a main active component comprising 40-50 wt.% nickel oxide; and auxiliary active component comprising 0.02-2 wt.% magnesium oxide, 1-5 wt.% molybdenum oxide, 2-5 wt.% tin oxide, 2-5 wt.% oxide compound A and 40-50 wt.% oxide compound B.    USE - A nickel-based saturated hydrogenation catalyst for C4, C5, C9 alkyne, diene, or olefin hydrogenation.    ADVANTAGE - The catalyst has high hydrogenation activity, and capable of carrying hydrogenation reaction at low temperature.    DETAILED DESCRIPTION - A nickel-based saturated hydrogenation catalyst comprises a main active component comprising 40-50 wt.% nickel oxide; and auxiliary active component comprising 0.02-2 wt.% magnesium oxide, 1-5 wt.% molybdenum oxide, 2-5 wt.% tin oxide, 2-5 wt.% oxide compound A of formula X1O and 40-50 wt.% oxide compound B of formula X2O. The catalyst has specific surface area of 100-180 m2/g and pore volume of 0.4-0.8 ml/g.    X1=Cu, Mg, Zr, Zn or La; and    X2=Si, Al or Ti.    INDEPENDENT CLAIMS are included for:    (1) a method of preparing the nickel-based saturated hydrogenation catalyst comprising mixing main active component and auxiliary active component, heating at 40-100 degrees C, adding 30-85 wt.% salt aqueous solution, stirring, adding precipitator, mixing, adding precursor A and precursor B, adjusting pH value to 8-9, stirring for 1-2 hours, filtering, washing the filter cake, and drying at 330-500 degrees C for 3-5 hours;    (2) method of using nickel-based saturated hydrogenation catalyst in a reduction with hydrogen comprising performing reducing reaction at 350-450 degrees C for 12-30 hours, cooling to 80-150 degrees C, introducing nitrogen to further reduce temperature to 30-50 degrees C, stopping introduction of nitrogen, controlling temperature at 45 degrees C, and passivating the catalyst at 120-200 degrees C for 4-10 hours; and    (3) a method of regenerating hydrogenation catalyst comprising heating the used catalyst at 100 degrees C and pressure of 0.4-0.5 MPa in the presence of hydrogen controlled at 30-50 m3/hour for 5-10 hours, heating to 230-270 degrees C with a temperature gradient of 25-35 degrees C/hour, preserving temperature for 8-10 hours, cooling to 50 degrees C.