The invention discloses a catalytic hydrogenation method of cyclohexane polyfluorobenzene liquid crystal monomer; catalytic hydrogenation is carried out on a cyclohexenyl polyfluorobenzene compound toobtain the cyclohexane polyfluorobenzene; wherein, by using 5% Pd/C as a catalyst in a catalytic system and adding a proper inorganic acid or an organic acid, the catalytic hydrogenation reaction ofthe cyclohexenyl polyfluorobenzene compound is carried out. The catalytic method of the invention is capable of effectively inhibiting hydrogenolysis and defluorination in the reaction and belongs tothe technical field of catalytic synthesis of fine chemical products. The invention is capable of effectively inhibiting generation of products obtained by hydrogenolysis and defluorination in the catalytic hydrogenation reaction by regulating the properties of additives and reaction medium and basically eliminating the problems of product separation and purification caused by the side reactions of hydrogenolysis and defluorination. The reaction technology has the characteristics of simple operation, high yield and high purity.