Process for preparing hydrogenated C5/C9 copolymerized petroleum resin

The invention discloses a preparing method of hydrogenated C5/C9 copolymerized oil resin, which comprises the following steps: dissolving C5/C9 copolymer oil resin in the hydrogenation solvent; decoloring through adsorbing agent to proceed catalytic hydrogenating reaction with hydrogen in the fixed bed reactor at 220-270 Deg C under 2.0-8.0Mpa; setting the bulk air-speed at 0.1-1.0h-1 and hydrogen and oil rate at 300-3000:1; allocating the catalyst as load-patterned nickel catalyst with 35-50% Ni; adopting gamma-Al2O3 as carrier with specific area at 150-300m2/g and hole conpacitance at 0.2-0.4ml/g; decompressing hydrogenated product; distilling to recycle solvent to obtain the product.